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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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Replies to This Discussion

ak or 

my dear fellows! enjoy happy life.

IT is 100% correct solution with detail, so plz don,t copy.

take idea and solve better as you can do....

GOD BLESS YOU

Attachments:

please convert this file into word or PDF file

Please Discuss here about this assignment.Thanks

Our main purpose here discussion not just Solution

All students must share points and also your problems.... so it can discussed and solution can prepare.

Don’t wait for solutions just participate in Discussions because after discussions a correct solution will prepare...

guys i got the solution of question 2 part 1st but find a problem please tell me from where we use the table of areaS in order to find out the value of 0<Z<2.381 FOR getting the right answer.

we can find the value  from z table of areas under the normal curve  from http://www.pinkmonkey.com/studyguides/subjects/stats/appendix/s58.gif

how can we find correct value from this table i'm littel confussed...

 

we want to find the value of 2.38 so in first colum 2.3 and in 9th row 0.4913  coz table strt from 0.00 and we want the value of 8 which cum in 9th row 

i solved first 2 questions but don't know its right or wrong please confirme the answers

Question 1a: mean= 20 and variance = 7.84

Question 1b -3.94<= mean <= 5.54

the answer number of Q1a is correct but Q1b  answer  is different from my answer so i dnt knw ur answer is right or my 

how did you find 2.38??? will you explain this...

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