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Test the difference in means with two populations when o is known 1. Two independent random samples are drawn from two colleges in Texas to investigate annual salaries of the new graduates. Assume that we know population standard deviations of the annual salary. College A College B Sample Size 100 120 Sample Mean (in $1000) 72 65 Population Standard Deviation (in $1000) 25 20 a. We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies. Compute the test statistic. b. Compute the p-value; and at a= .05, test the llypotheses. c. Which company, if either, appears to have the higher salary? Provide a 95% confidence interval for the difference between the population mean salary of employees for the two companies.

Test the difference in means with two populations when o is known 1. Two independent random samples are drawn from two colleges in Texas to investigate annual salaries of the new graduates. Assume that we know population standard deviations of the annual salary. College A College B Sample Size 100 120 Sample Mean (in $1000) 72 65 Population Standard Deviation (in $1000) 25 20 a. We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies. Compute the test statistic. b. Compute the p-value; and at a= .05, test the llypotheses. c. Which company, if either, appears to have the higher salary? Provide a 95% confidence interval for the difference between the population mean salary of employees for the two companies.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Test the difference in means with two populations when a is known 1. Two independent random samples are drawn from two colleges in Texas to investigate annual salaries of the new graduates. Assume that we know population standard deviations of the annual salary. College A College B Sample Size 100 120 Sample Mean (in $1000) 72 65 Population Standard Deviation (in $1000) 25 20 a. We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies. Compute the test statistic. b. Compute the p-value; and at a = .05, test the lypotheses. c. Which company, if either, appears to have the higher salary? Provide a 95% confidence interval for the difference between the population mean salary of employees for the two companies.
Transcribed Image Text:Test the difference in means with two populations when a is known 1. Two independent random samples are drawn from two colleges in Texas to investigate annual salaries of the new graduates. Assume that we know population standard deviations of the annual salary. College A College B Sample Size 100 120 Sample Mean (in $1000) 72 65 Population Standard Deviation (in $1000) 25 20 a. We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies. Compute the test statistic. b. Compute the p-value; and at a = .05, test the lypotheses. c. Which company, if either, appears to have the higher salary? Provide a 95% confidence interval for the difference between the population mean salary of employees for the two companies.
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