A point estimate for the difference between the population A mean and the population B mean is The test statistic is: (round to 4 decimals) The p-value is: (round to 4 decimals) At the 5% level of significance, the conclusion is:

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Independent random samples taken at two companies provided the following information regarding annual salaries of the employees. The population standard deviations are also given below. We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies.

 

Company A

Company B

Sample Size

43

40

Sample Mean (in $1000)

47

42

Population Standard Deviation (in $1000)

12

10

A point estimate for the difference between the population A mean and the population B mean is

The test statistic is: (round to 4 decimals)

The p-value is: (round to 4 decimals)
At the 5% level of significance, the conclusion is:

 

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