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(solution) Course Student ID / Login ID. Name. PVC Name /Code Due


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Course

 

Student ID / Login ID.

 

Name.

 

PVC Name /Code

 

Due Date.

 

Total marks.

 

Assignment 8 Sta301 30 Fall 2016 Question 1

 

10 Marks

 

It is claimed that by using an automatic filling machine, the average amount of chips in

 

each bag is 100 grams. A random sample of 12 bags of chips showed a mean weight of

 

101.25 grams with a standard deviation of 2.5 grams. Is the machine operating properly

 

at 0.05 level of significance?

 

Question 2

 

10 Marks

 

A random sample of size 400 is drawn from a normal population. The sample means and

 

standard deviation are 5.2 and 3.7 respectively.

 

(i) Estimate standard error of mean.

 

(ii) Test at 5% level of significance that population mean is not more than 5.

 

Question 3

 

10 Marks

 

Investigating the success of its interviews, a firm finds that 176 out of 225 interviews

 

attempted by trained interviewers are successfully completed. 310 interviews attempted

 

by untrained interviewers, only 188 are successfully completed. Determine whether these

 

data provide sufficient evidence at the 5% level of significance to indicate a relationship

 

between the training status of interviewers and the outcome of interview attempted.

 

Note= USE SPSS SOFTWARE AND INTERPRET IT.

 

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Sep 13, 2020

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