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Assignment No.4 (Course STA301)

 Fall 2012 (Total Marks15)

 

Deadline

Your Assignment must be uploaded/ submitted before or on

23:59 30th Jan   , 2013

(STUDENTS ARE STRICTLY DIRECTED TO SUBMIT THEIR ASSIGNMENT BEFORE OR BY DUE DATE. NO ASSIGNMNENT AFTER DUE DATE WILL BE ACCEPTED VIA E.MAIL).

Rules for Marking

It should be clear that your Assignment will not get any credit IF:

  • The Assignment submitted, via email, after due date.
  • The submitted Assignment is not found as MS Word document file.
  • There will be unnecessary, extra or irrelevant material.
  • The Statistical notations/symbols are not well-written i.e., without using MathType software.
  • The Assignment will be copied from handouts, internet or from any other student’s file. Copied material (from handouts, any book or by any website) will be awarded ZERO MARKS. It is PLAGIARISM and an Academic Crime.
  • The medium of the course is English. Assignment in Urdu or Roman languages will not be accepted.
  • Assignment means Comprehensive yet precise accurate details about the given topic quoting different sources (books/articles/websites etc.). Do not rely only on handouts. You can take data/information from different authentic sources (like books, magazines, website etc) BUT express/organize all the collected material in YOUR OWN WORDS. Only then you will get good marks.

 

Objective(s) of this Assignment:

 

  • The assignment is being uploaded to build up the concepts about the Confidence interval and sampling distributions.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

  •  How to get interpretation about Confidence interval.  

 

 

Assignment # 4 (Lessons 31- 36)

 

Question 1:                                                                                                                        (Marks: 2+5=7)

a. In a finite population with  and  , find the mean and variance for the sampling distribution of sample mean for n = 25.

 

b. The mean and standard deviation of the maximum loads supported by 50 cables are 13 tons and 0.80 tons respectively. Find the 99% confidence interval for the mean of the maximum loads of all cables produced by the company. Also interpret the findings.

Question 2:                                                                                                             (Marks: 5+3=8)

  1. If  is normally distributed with  and .

       Find the

 

  1. A sample of people at the university cafeteria on meatless day showed 20% of them preferred vegetable dishes. How large a sample is needed if we want to be 95% confident that our estimate of population proportion is within 0.03?

 

-End- 


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Views: 16477

Replies to This Discussion

i think this is right solution if there is any mistake then plzzz cmnt

Attachments:

ash ye Q2 part b ka ans.. n = 682.9511 kaise araha hy? mere pas 6829511.111 araha hy.. how did you solve the last step? please tell

anusha see

n= (1.96/0.03)2  (0.20)x(0.80)

n= (1.96/0.03)2  (0.16)

n=(65.3333)2  (0.16)

n=(4268.4444)x(0.16)

n=682.9511

thank you for helping !

aoa question 2 k part 1 main frmula kon sa use hoga koi baty ga 

ash ye 100% correct he puri file plzzzzzzzzzzz tell me mae bht parehsan hn

q 2 prt 1 main table use krty tu 2.38 ki value 0.4913 hy jab k ap log 0.4893 use kr rhy main wrong hon ya ap log plz bato jaldi lec no 33 main jasy main vlue nekl rhi wasy he nekli hy 

plzzzzzzzz koi to 100% solution file bhej do

question 1 a =7.84

                b= 21.71 or13.28

question 2 a =.2607

                  b =682.9511

plzzzzzzzzzzzzzzzzz tell me that answer  are correct or not plz anyone help me...........

Hey, Its 12.97 not 21.71

nh ap right ha table use krty tu 2.38 ki value 0.4913 yahi ati ha or then as ka answer  0.2587

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