Question 10

You may need to use the appropriate appendix table or technology to answer this question.

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.

	Company A	Company B
Sample Size	77	53
Sample Mean (in $1,000)	43	37
Population Standard Deviation (in $1,000)	11	13

We want to determine whether or not there is a significant difference between the average salaries of the employees at the two companies.

(a)Compute the test statistic. (Use Company ACompany B. Round your answer to four decimal places.)

(b)Compute thep-value. (Round your answer to four decimal places.)

p-value =

Question 11

You may need to use the appropriateappendix tableortechnologyto answer this question.The following information is given concerning the ACT scores of high school seniors from two local schools.

School A	School B
n1=13	n2=13
x1=24	x2=22
12=16	22=11

Develop a 98% confidence interval estimate for the difference between the two population means.

Assume the two populations are normally distributed. (Use School ASchool B. Round your answers to three decimal places.)

to

Please bold the answers