Author Question: The following information regarding the yearly salaries (in $1,000) of CEOs in 2010 and 2009 are ... (Read 22 times)

dhsndn · **on:** Mar 25, 2023

Question 1

The following information regarding the number of semester hours taken from random samples of day and evening students is provided.

	Day	Evening
	16	12
s	4	2
n	140	160

Develop a 95% confidence interval estimate for the difference between the mean semester hours taken by the two groups of students.

Question 2

The following information regarding the yearly salaries (in $1,000) of CEO’s in 2010 and 2009 are provided.

	Year 2010	Year 2009
Sample size	190	145
Sample Mean	560	540
Population Standard Deviation	80	90

a.	At 95% confidence, perform a test to determine if there has been a significant *increase* in the salaries of CEO’s. Use the Critical Value Approach.
b.	Compute the p-value.

sadoniam · **Reply #1 on:** Mar 25, 2023

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