Sunday, May 8, 2016

Task 4 B.Inggris bisnis : business letter

Hello World , i will explain about Business letter , Check this out !

A business letter is a letter written in formal language, usually used when writing from one business organization to another, or for correspondence between such organizations and their customers, clients and other external parties. The overall style of letter will depend on the relationship between the parties concerned. There are many reasons to write a business letter. It could be to request direct information or action from another party, to order supplies from a supplier, to identify a mistake that was committed, to reply directly to a request, to apologize for a wrong or simply to convey goodwill. Even today, the business letter is still very useful because it produces a permanent record, is confidential, formal and delivers persuasive, well-considered messages.

 The components
  • The Heading (The Retern Address) or Letterhead - Companies usually use printed paper where heading or letterhead is specially designed at the top of the sheet. It bears all the necessary information about the organisation’s identity.


  • Date - Date of writing. The month should be fully spelled out and the year written with all four digits October 12, 2005
    (12 October 2005 - UK style). The date is aligned with the return address. The number of the date is pronounced as an ordinal figure, though the endings st, nd, rd, th, are often omitted in writing. The article before the number of the day is pronounced but not written. In the body of the letter, however, the article is written when the name of the month is not mentioned with the day.


  • The Inside Address - In a business or formal letter you should give the address of the recipient after your own address. Include the recipient's name, company, address and postal code. Add job title if appropriate. Separate the recipient's name and title with a comma. Double check that you have the correct spelling of the recipient 's name.

    The Inside Address is always on the left margin. If an 8 1/2" x 11" paper is folded in thirds to fit in a standard 9" business envelope, the inside address can appear through the window in the envelope.


  • The Greeting - Also called the salutation. The type of salutation depends on your relationship with the recipient. It normally begins with the word "Dear" and always includes the person's last name. Use every resource possible to address your letter to an actual person. If you do not know the name or the sex of of your reciever address it to Dear Madam/Sir (or Dear Sales Manager or Dear Human Resources Director). As a general rule the greeting in a business letter ends in a colon (US style). It is also acceptable to use a comma (UK style).


  • The Subject Line (optional) - Its inclusion can help the recipient in dealing successfully with the aims of your letter. Normally the subject sentence is preceded with the word Subject: or Re: Subject line may be emphasized by underlining, using bold font, or all captial letters. It is usually placed one line below the greeting but alternatively can be located directly after the "inside address," before the "greeting."


  • The Body Paragraphs - The body is where you explain why you’re writing. It’s the main part of the business letter. Make sure the receiver knows who you are and why you are writing but try to avoid starting with "I". Use a new paragraph when you wish to introduce a new idea or element into your letter. Depending on the letter style you choose, paragraphs may be indented. Regardless of format, skip a line between paragraphs.


  • The Complimentary Close - This short, polite closing ends always with a comma. It is either at the left margin or its left edge is in the center, depending on the Business Letter Style that you use. It begins at the same column the heading does. The traditional rule of etiquette in Britain is that a formal letter starting "Dear Sir or Madam" must end "Yours faithfully", while a letter starting "Dear " must end "Yours sincerely". (Note: the second word of the closing is NOT capitalized)


  • Signature and Writer’s identification - The signature is the last part of the letter. You should sign your first and last names. The signature line may include a second line for a title, if appropriate. The signature should start directly above the first letter of the signature line in the space between the close and the signature line. Use blue or black ink.


  • Initials, Enclosures, Copies - Initials are to be included if someone other than the writer types the letter. If you include other material in the letter, put 'Enclosure', 'Enc.', or ' Encs. ', as appropriate, two lines below the last entry. cc means a copy or copies are sent to someone else
The Different between Full block style and semi Block Style

Full block style is a letter format in which all text is justified to the left margin. In block letter style, standard punctuation is placed after salutations and in other headings. Open punctuation, however, refers to a modification of style where all nonessential punctuation is omitted. A few key factors will help you understand block style format and the difference that open punctuation makes..

Block Format Headings

In block letter format, all text is flush with the left margin. The sender's address is written at the top of the page, unless the letter is written on letterhead. After the sender's address or logo, a space is entered, followed by the date. After the date, another space is entered, and the recipient's full name and address are typed. For example: Joe Smith 123 Pine Road Fayettville, Georgia 33889 July 16, 2012 Mr. Richard Jones 456 Oak Lane Farmville, Georgia 33888 If you are using open punctuation, omit the punctuation from the address lines and write the addresses in all capital letters. For example: JOE SMITH 123 PINE ROAD FAYETTVILLE GEORGIA 33889

Letter Body

The body of a block letter is written in single-spaced paragraphs aligned to the left margin. A single space is placed between paragraphs. Even in open punctuation, periods and commas are still necessary within paragraphs to separate sentences. However, if you include a list of bullet points in the letter, omit the punctuation. For example: Mrs Smith: Your recent order has been shipped. It will arrive on July 28th. Your order contains the following items: three end tables two dining chairs one lamp one table setting Because punctuation was necessary for meaning within the sentences, it was included. Punctuation was omitted from the list because the spacing makes it clear that the items are separate.

Salutation

In block letter style, the salutation should begin with "Dear" and should be followed with the proper prefix and last name of the recipient. Although many letter writers are used to following a salutation with a comma, the salutation is followed by a colon in block letter format. For example: Dear Ms. Smith: In open punctuation, the colon is omitted because all punctuation is left open on headings and salutations. For example: Dear Ms. Smith Because the colon is not essential after "Smith," the punctuation mark is omitted.


Example




Thats enough from me thanks a lot

Great thanks  to :
https://wawanoutsider.wordpress.com/2012/10/24/definition-business-letter/
http://www.studyenglishtoday.net/business-letter-parts.html
http://work.chron.com/differences-between-full-block-style-business-letter-full-block-style-open-punctuation-7442.html

Friday, April 15, 2016

English bussines task 3

Hello world !! i wrote this article to fulfill my English bussines task 3 and this task about English Tenses..
and here is the task.. Check this out!
   
     In grammar, tense is a category that expresses time reference. Tenses are usually manifested by the use of specific forms of verbs, particularly in their conjugation patterns.
Basic tenses found in many languages include the past, present and future. Some languages have only two distinct tenses, such as past and non-past, or future and non-future. There are also tenseless languages, like Chinese, which do not have tense at all. On the other hand, some languages make finer tense distinctions, such as remote vs. recent past, or near vs. remote future.

There are 16 Tenses in English. There are:
  • Simple Present Tense
  • Present Continuous Tense
  • Present Perfect Tense
  • Present Perfect Continuous Tense
  • Simple Past Tense
  • Past Continuous Tense
  • Past Perfect Tense
  • Past Perfect Continuous Tense
  • Simple Future Tense
  • Future Continuous Tense
  • Future Perfect Tense
  • Future Perfect Continuous Tense
  • Past Future Tense
  • Past Future Continuous Tense
  • Past Future Perfect Tense
  • Past Future Perfect Continuous Tense

1. Simple Present Tense

This tenses are used to denote something that is fixed, habitual or an essential truth. Because it is often related to the incident at about past, present and future, this at least has the Tenses description for a certain time.
FORM:
(+) Subject (s) + Verb1 + Object (o)
ex:  Budi play baseball game
      I watch deadpool movie
(-) S+do/does not+Verb1+O
ex: Budi doesn’t play baseball game
     I dont watch the deadpool movie
(?) Do/Does + S + Verb1 + O
ex: Does Budi play the baseball game ?
     Did i watch the deadpool movie
 
*I, You, They, We use do when it come to negative and question sentence. While He, She, It use does.
 

2. Present Continuous Tense

This tenses are used to express an action which is actually being done at this time.
FORM:
(+) S + to be + Verb-ing + O
ex: They are Riding a dragon
      I'm Eating fried rice 
(-) S + to be + not + Verb-ing + O
ex: They aren't Riding the Dragon
     I'm not eating fried rice
(?) to be + S + Verb-ing + O
ex: Are they riding the dragon ?

* TO BE : I = am , YOU/THEY/WE = are , HE/SHE/IT = is

3. Present Perfect Tense

This tenses are used to express your experience. This sentence can used to say that you have never had a certain experience. Present Perfect Tense didn’t use to describe specific event.
FORM:
(+) S + Has/Have + Past Participle (V3)
ex: I have Played Dota 2 before
     She has deserved a love
(-) S + Has/Have + not + past participle (V3)
ex: I Haven't Played Dota 2 before
     She hasn't deserved the love
(?) Has/Have + S + past participle (V3)
ex: Have You Played Dota 2 before ?
      Has she deserved the love ? 

*Have is used with some pronouns and plural nouns.
  Has is used with the third person singular.

4. Present Perfect Continuous Tense

Present Perfect Continuous Tense is used to show that something started in the past and has continued up until now. ”for two hours’, ‘for two weeks’, ‘since yesterday’ are all durations which can be used with this sentence. Without the durations, the tense has a more general meaning of “lately.” We often use the words “lately” or “recently” to emphasize this meaning.
FORM:
(+) S + have/has + been + Verb-ing + O
ex: We have been Riding our Our Dragon since Yesterday .
      He has been joining the akatsuki since first episode
(-) S + have/has + been + Verb-ing + O
ex: We have not been Riding our Our Dragon since Yesterday.
      He has not been joining the akatsuki since first episode
(?) have/has + S + been + Verb-ing + O
ex: Have they been Riding our Their Dragon ?
     does he has joining the akatsuki ?  

5. Simple Past Tense

We used this tense to talk about the past.
FORM:
(+) S + Verb2 + O
ex: He fought the Nights
(-) S + did + not + Verb1
ex: He didn't fought the Nights
(?) did + S + verb1 + O
ex: Did He fought the Nights ?

6. Past Continuous Tense

This tense is used to say when we were in the middle of doing at a particular moment in the past.
FORM:
(+) S + was/were + Verb-ing
ex: He was Smiling
     We were Drinking
(-) S + was/were + not + Verb-ing
ex: He wasn’t smiliing
     We were not Drinking
(?) Was/were + S + Verb-ing
ex: Was He smiling ?
      Were they Drinking ?

*I/He/She/It = Was , You/They/We = Were

7. Past Perfect Tense

The Past Perfect expresses the idea that something occurred before another action in the past. It can also show that something happened before a specific time in the past.
FORM:
had+past participle
(+)
ex: I had Watch the movie when they come to my home
(-)
ex: I had not Watch the movie when they come to my home
(?)
ex: did you had watch the movie ?

8. Past Perfect Continuous Tense

We use the Past Perfect Continuous to show that something started in the past and continued up until another time in the past. “For five minutes” and “for two weeks” are both durations which can be used with the Past Perfect Continuous. Notice that this is related to the Present Perfect Continuous however, the duration does not continue until now, it stops before something else in the past.
FORM:
S + had + been + Verb-ing
ex: Mirana had been study at the Gunadarma university for 2 year before she left to Indonesia.

9. Simple Future Tense

often called will. because, the modal auxiliary verb in this sentence is will.
FORM :
(+) S + WILL + Verb1
ex: I will rule the world
     She will broke my heart
(-) S+WILL+not+Verb1
ex: I will not rule the world
     She will broke my heart
(?) will + S + Verb1
ex: Will you rule the world ?
      Will She broke your heart?

10. Future Continuous Tense

Future Continuous has two different forms: “will be doing ” and “be going to be doing”. Future Continuous forms are usually interchangeable.
FORM:
(+) S + will be + Verb-ing
ex: I will be going to Japan.
(-) S + will not  be + Verb-ing
ex: I won’t be going to Korea
(?) will + S + be + Verb-ing
ex: Will you going to japan?

11. Future Perfect Tense

This sentence is used when we talk about the past in the future.
FORM:
(+) S + Will + have + Verb3
ex: The Hatters will have come
(-) S + will + not + have + Verb3
ex: The Hatters will not have come
(?)  Will + S + have + Verb3
ex: will Hatters have come ?

12. Future Perfect Continuous Tense

We use the future perfect continuous tense to talk about a long action before some point in the future.
FORM:
(+) S + Will + have + been + Verb-ing
ex: Eichiro Oda will have been Drawing the One Piece
(-) S + will + not + have + been + Verb-ing
ex:  Eichiro Oda Won't have been Drawing the Naruto
(?) Will + S + have + been + Verb-ing ?
ex: Will Eichiro Oda have been Drawing the One Piece ?

13. Past Future Tense

this tense is used to express the events that WILL be done, BUT in the past, not the present.
FORM:
(+) S + would + Verb1
ex: He would Destroy you.
(-) S + Would + not + Verb1
ex: He would not Destroy me
(?) Would + S + Verb1?
ex: Would he destroy me ?

14. Past Future Continuous Tense

Past Future Continuous tells an action would be in progress in the past.
FORM:
(+) S + was/were + going to be + Verb-ing
ex: She was going to be Gambling tonight
(-) S + was/were + not + going to be + Verb-ing
ex: She wasn't going to be Gambling tomorrow
(?) Was/were + S + going to be + Verb-ing
ex: was she going to be Gambling tonight ?
time signals for this tense is time in the past like, this morning, yesterday, last night, last week and so on.

15. Past Future Perfect Tense

This tense is restates the action stated in Future Perfect Tense but with different time dimension, it is in past time whilst the Future Perfect is in future time (not happen yet).
FORM:
(+) S + would + have + Verb3
ex: I would have get her heart Yesterday
(-) S + would + not + have + Verb3
ex: I wouldn’t have Her heart Yesterday
(?) Would + S + have + Verb3
ex: Would you have Her heart yestersday ?

16. Past Future Perfect Continuous Tense

Past Future Perfect Continuous Tense emphasizes on the course and the duration of the action. Past Future Perfect Continuous Tense is used to tell an action which would have been happening until a certain time (period) in the past.
FORM:
(+) S + would + have + been + verb-ing
ex: Felix would have been making video when he played the game
(-) S+ would + not + have + been + verb-ing
ex: Felix would not have been making video when he played the game
(?) Would + subject + have + been + verb-ing?
ex: Would Felix have been making video when he played the game?

That's it , thank you so much :D

thanks to https://afaafahhb.wordpress.com/2013/04/02/16-tenses-in-english-2/ 
and thanks a lot to google XD








 



Saturday, April 2, 2016

Differences Between TOEIC and TOEFL

Hello World, If English is not your first language, you will most likely have to take a test like the Test of English as a Foreign Language as part of your college application. Likewise, if you are applying for a job in an English-speaking country, you may have to take the Test of English for International Communication as part of the hiring process. There are several key differences between these two tests.

TOEIC

The Test of English for International Communication (TOEIC) is "an English language test designed specifically to measure the everyday English skills of people working in an international environment."
There are different forms of the exam: The TOEIC Listening & Reading Test consists of two equally graded tests of comprehension assessment activities totaling a possible 990 score; the newer TOEIC Speaking & Writing Test comprises tests of pronunciation, vocabulary, grammar, fluency, overall coherence, and structure (organization of sentences) totaling a possible 400 score.

TOEFL

Test of English as a Foreign Language (TOEFL, /ˈtoʊfΙ™l/, toh-fΙ™l) is a standardized test to measure the English languageability of non-native speakers wishing to enroll in American universities. The test is accepted by many English-speakingacademic and professional institutions. TOEFL is one of the two major English-language tests in the world, the other being theIELTS.
TOEFL is a trademark of the Educational Testing Service (ETS), a private non-profit organization, which designs and administers the tests. ETS issues official score reports, sent independently to institutions, for two years following the test


THE DIFFERENCES BETWEEN THOSE 

Who Takes the TOEFL vs. the TOEIC

 The TOEFL measures the test-taker's ability to function in an English-speaking academic environment. The target test-taker for the TOEFL is a candidate for higher education in an English-speaking country. The TOEIC, on the other hand, measures the ability to function in a general work environment. This test is used in nonacademic settings as a measure of the ability of a current or potential employee to communicate effectively in English in a variety of business settings and situations.

Test Formats

The TOEFL is a four-section test that includes sections for reading, listening, speaking and writing. It is taken exclusively on the computer. The TOEIC is broken into two separate but complementary exams: the Reading and Listening Test, which is a paper-and-pencil test, and the Speaking and Writing Test, which is taken on a computer. The exams are broken up in this way so potential employers can choose to measure an employee's reading and listening or speaking and writing skills only, or all four language skills. The Reading and Listening Test will take about two-and-a-half hours to complete, and for the Speaking and Writing Test, the speaking section will last about 20 minutes, and the writing section will take 60 minutes to complete.

Test Content

In the TOEFL, the test-taker is measured on his ability to function in an academic environment. In this regard, the vocabulary on this test is academic in nature and is similar to the vocabulary used in college text books. The topics of the reading and listening passages are similarly academic. You may read a passage on bird migration, for example, or listen to a lecture from an economics course. The TOEIC, on the other hand, measures the test-taker's ability to function in a business environment. Topics may range from dining out in a restaurant to presenting in a budget meeting

Test Scores

On the TOEFL iBT, the maximum possible score is 120 -- 30 points for each of the four sections. There is no "passing score" and colleges and universities will have their own requirements for admission, which test-takers can find information about through the admissions office. The TOEIC Reading and Listening test gives the test-taker a score of 10 to 990, which corresponds to bands in the Common European Framework measure of English proficiency. A test-taker will receive scores of zero to 200 for the Speaking and Writing Tests separately, again which corresponds to the CEF standards of English-language proficiency measurements.

.
http://education.seattlepi.com/differences-between-toefl-toeic-1513.html

Friday, March 11, 2016

Bhs. Inggris Business task 1



Hello world! , My name is Ihsan Sanubari people used to call me Ihsan,and my nickname in the cyber world is “traflaw13” and “sxan”:D , I was born to war(haha im just kidding) I was born in Subang 13th July 1996, Im an ordinary Indonesian Boy  and I 100 percent moslem,i live on Cendana II street block B5/11a, im live with my lovely family and I am the eldest dragon son in my family, I am student of System Computer Gunadarma University.
Im interested in Computer stuff ,Im always spent my spare time in my room and do the lazy thing like playing a games,listeting music ,watching a movie ,and sometimes I do my homework probably :P, about the game my the most epic favorite game is Dota 2 :D this game is the best game I ever played in my life hahaha. My favourite movie genre is Historical, for me Historical movie is the best way to get understand about past so we can learn something in this life XD. And i love so many genre of music,I like One Ok Rock and Coldplay their made an awesome music and I love it  
I have motivation in my life to keep me on top to make me surivive and my motivation is “life never teach you to give up, so just keep moving on!” this word give me strength to life :D. in the future ,the innovation in my mind is : I will create some software/hardware that will prevent me to loosing my stuff and I will called it “tracker”and the main function is we can track all of our stuff(s) so we never lose anything again…
Thank you so much for your time to read all about me :D  (and I swear, this manual translated by me , Sorry for my bad grammar )

Thursday, January 21, 2016

Tugas ke-4 Softskill Pengantar Statistika

Distribusi Peluang Kontinu
A.   Pengertian Distribusi Peluang Kontinu
Distribusi peluang kontinu adalah peubah acak yang dapat memperoleh semua nilai pada skala kontinu. Ruang sampel kontinu adalah bila ruang sampel mengandung titik sampel yang tak terhingga banyaknya. Syarat dari distribusi kontinu adalah apabila fungsi f(x) adalah fungsi padat peluang peubah acak kontinu X yang didefinisikan di atas himpunan semua bilangan riil R bila:

1.  F(x) ≥ 0 untuk semua x Ρ” R

∞

2.   ∫     𝑓(π‘₯)𝑑π‘₯ = 1

∞

∞

3.      𝑃(π‘Ž < 𝑋 < 𝑏) =  ∫           𝑓(π‘₯)𝑑π‘₯

∞


B.    Konsep dan Teorema Distribusi

1. Distribusi Normal

Distribusi Normal (Gaussian) mungkin merupakan distribusi probabilitas yang
paling penting baik dalam teori maupun aplikasi statistik. Distribusi ini paling banyak
digunakan sebagai model bagi data riil di berbagai bidang yang meliputi antara lain
karakteristik fisik makhluk hidup (berat, tinggi badan manusia, hewan, dll). Terdapat
empat alasan mengapa distribusi normal menjadi distribusi yang paling penting :

a. Distribusi normal terjadi secara alamiah.

b. Beberapa variabel acak yang tidak terdistribusi secara normal dapat dengan mudah
    
ditransformasi menjadi suatu distribusi variabel acak yang normal.

c. Banyak hasil dan teknik analisis yang berguna dalam pekerjaan statistik hanya bisa
    
berfungsi dengan benar jika model distribusinya merupakan distribusi normal.

d. Ada beberapa variabel acak yang tidak menunjukkan distribusi normal pada
    
populasinya, namun distribusi dari rata-rata sampel yang diambil secara random

dari populasi tersebut ternyata menunjukkan distribusi normal.

Distribusi Normal disebut juga Gausian distribution adalah salah satu fungsi distribusi peluang berbentuk lonceng seperti gambar berikut. 



Berdasarkan gambar di atas, distribusi Normal akan memiliki beberapa ciri diantaranya: 
a. Kurvanya berbentuk garis lengkung yang halus dan berbentuk seperti genta.  
b. Simetris terhadap rataan (mean). 
c. Kedua ekor/ ujungnya semakin mendekati sumbu absisnya tetapi tidak Pernah                  memotong.  
d. Jarak titik belok kurva tersebut dengan sumbu simetrisnya sama dengan Οƒ 
e. Luas daerah di bawah lengkungan kurva tersebut dari - ~ sampai + ~ sama dengan                 1 atau 100 %.

          
    2. Distribusi Chi-Kuadrat (𝝌𝟐)

Distribusi chi-kuadrat merupakan distribusi yang banyak digunakan dalam sejumlah  prosedur  statistik  inferensial.  Distribusi  chi-kuadrat  merupakan  kasus khusus dari distribusi gamma dengan faktor bentuk 𝛼 = 𝑣/2, dimana v adalah bilangan bulat positif dan faktor skala 𝛽 = 2.

Jika variabel acak kontinu X memiliki distribusi chi-kudrat dengan parameter v, maka fungsi kepadatan probabilitas dari X adalah :


Parameter n disebut angka derajat kebebasan (degree of freedom/df) dari X. Sedangkan fungsi distribusi kumulatif chi-kuadrat adalah :

Berikut  ini  diberikan  rumusan  beberapa  ukuran  statistik  deskriptif  untuk distribusi chi-kuadrat
3. Distribusi F
        Menurut Gasperz (1989:251), secara teori sebaran F merupakan rasio dari dua sebaran chi kuadrat yang bebas. Oleh karena itu peubah acak F diberikan sebagai:
                                                                                 
  𝑋2 =  π‘›π‘–π‘™π‘Žπ‘– π‘‘π‘Žπ‘Ÿπ‘– π‘ π‘’π‘π‘Žπ‘Ÿπ‘Žπ‘› π‘β„Žπ‘– π‘˜π‘’π‘Žπ‘‘π‘Ÿπ‘Žπ‘‘ π‘‘π‘’π‘›π‘”π‘Žπ‘› π‘‘π‘’π‘Ÿπ‘Žπ‘—π‘Žπ‘‘ π‘π‘’π‘π‘Žπ‘  𝑉1 = 𝑛1 െ 1  
 π‘‹2 =  π‘›π‘–π‘™π‘Žπ‘– π‘‘π‘Žπ‘Ÿπ‘– π‘ π‘’π‘π‘Žπ‘Ÿπ‘Žπ‘› π‘β„Žπ‘– π‘˜π‘’π‘Žπ‘‘π‘Ÿπ‘Žπ‘‘ π‘‘π‘’π‘›π‘”π‘Žπ‘› π‘‘π‘’π‘Ÿπ‘Žπ‘—π‘Žπ‘‘ π‘π‘’π‘π‘Žπ‘  𝑉2 = 𝑛2 െ 1 Oleh  karena itu      sebaran F  mempunyai dua derajat bebas yaitu 𝑉1 π‘‘π‘Žπ‘› 𝑉2.

Misal :
Kita ingin mengetahui nilai F dengan derajat bebas 𝑉1 = 10 dan 𝑉2 = 12, maka jika 𝛼 = 0,05 dari tabel F diperoleh nilai 𝐹0,05 (10,12) = 2,75 

Cara Menggunakan Tabel Z



Tabel Z sebenarnya digunakan untuk memudahkan sobat dalam menghitung peluang (kerapatan probablitas) dari  distribusi normal. Rumus fungsi kerapatan probabilitas dari distribusi normal adalah

rumus fungsi distribus normal (tabel z)

Dimana ΞΌ adalah rata-rata, Οƒ adalah standar deviasi dan Ο€ = 3,14159. Grafik fungsi distribusi normalnya sendiri seperti di bawah ini

tabel z or z table

Grafik fungsi distribusi normal tersebut di atas membentang dari minus tak hingga hingga tak hingga. Hanya saja, semakin jauh dengan rata-rata (M1), nilai probabilitas akan semakin mendekati nol. Mungkin kalau sobat hanya menghitung nilai probabilitas dari suatu angka/titik mungkin ngga begitu susah, tinggal dimasukkan ke rumus (susah juga sih)

rumus fungsi distribus normal (tabel z)
Nah susahnya sobat, misal sobat menghitung probabilitas dari suatu range. Misal saja kita pakai contoh soal distribusi normal berikut

Rata-rata produktivitas padi di Aceh tahun 2009 adalah 6 ton per ha, dengan simpangan baku (s) 0,9 ton.  Jika luas sawah di Aceh 100.000 ha dan produktivitas padi berdistribusi normal (data tentatif), tentukan. Berapa luas sawah yang produktivitasnya lebih dari 8  ton? Sobat bisa saja ko pakai rumus berikut

menghitung probabilitas
Super njlimet kan kalau harus ngitung integral kaya gitu. Disinilah gunanya tabel Z. Kita hitung dulu nilai z dari soal di atas dengan rumus

Setelah itu tinggal kita gunakan tabel Z untuk menentukan probabilitasnya. Cara menggunakan tabel Z nya sebagai berikut

  1. Caranya buka Tabel Z dan lihat  sel pada perpotongan baris 2,20 dan kolom 0,02.
  2.  Sobat akan menemukan sebuah angka yaitu 0,98679 dan bila dijadikan persen menjadi 98,679%.
  3. Angka yang sobat temukan di tabel z tersebut menunjukkan  luas di bawah kurva normal baku dari titik 2,22 ke kiri kurva yaitu 98,679%. Karena luas seluruh di bawah kurva normal adalah 100%, maka luas dari titik 2,22 ke kanan kurva adalah 100% – 98,679% = 1,321% (arsir warna hitam pada gambar).  Oleh karena itu, luas sawah yang produktivitasnya lebih dari 8 ton adalah 1,321%, yaitu (1,321/100) x 100.000 ha = 1321 ha

Penggunaan Tabel t
Struktur tabel t yang umum adalah sebagai berikut
https://junaidichaniago.files.wordpress.com/2010/05/tabel-t.jpg 
Judul masing-masing kolom mulai dari kolom kedua (angka yang dicetak tebal) dari tabel tersebut adalah nilai probabilita (tingkat/taraf signifikansi). Nilai yang lebih kecil 
menunjukkan probabilita satu arah (satu sisi) sedangkan nilai yang lebih besar menunjukkanprobabilita kedua arah (dua sisi). Misalnya pada kolom kedua, angka 0,25 adalah probabilita satu arah sedangkan 0,50 adalah probabilita dua arah. 
Selanjutnya, judul masing-masing baris adalah derajat bebas (db) atau degree of freedom (df).   Seperti terlihat pada gambar diatas yang dimulai dari angka 1, dan biasanya pada buku-buku
statistik/ekonometrik sampai angka 200

Penggunaan tabel F
DERAJAT KEBEBASAN (DEGREE OF FREEDOM )
Derajat kebebasan mempunyai dua makna yang berbeda. Dalam kaitannya dengan 
distribusi statistic untuk memberikan nama dari salah satu parameternya. Dalam kaitannya dengan kecocokan model, derajat kebebasan menunjuk pada jumlah informasi yang independen yang ada digunakan untuk membuat estimasi terhadap informasi yang lain. Umumnya kita memulai jumlah derajat kebebasan dengan data. Semakin suatu prosedur atau model cocok,maka jumlah derajat kebebasan semakin kecil.Penghitungan derajat kebebasan dilakukan melalui ukuran sampel. Derajat kebebasan merupakan pengukuran jumlah informasi dari data sample yang telah digunakan. Setiap penghitungan statistik dilakukan dari suatu sampel tertentu maka satu derajat kebebasan digunakan. Setiap rumus dalam SPSS cara menghitung derajat kebebasan (DF /Degree of Freedom) berbeda, misalnya dalam Chi Square untuk menghitung DF digunakan rumus (C-1) x (R-1); sedang ntuk uji t sampel bebas untuk menghitung DF digunakan rumus n-2; untuk uji t sampel berpasangan untuk menghitung DF digunakan rumus n-1 dstnya

http://rumushitung.com/2013/01/23/tabel-t-dan-cara-menggunakannya/
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