The National Association of Home Builders provided data on the cost of the most popular home remodeling projects. Sample data on cost in thousands of dollars for two types of
remodeling projects are as follows.
Kitchen
Kitchen
Master Bedroom
25.2
17.4
22.8
21.9
19.7
Master Bedroom
18.0
22.9
26.4
24.8
26.9
23.0
19.7
16.9
21.8
23.6
17.8
24.6
21.0
a. Develop a point estimate of the difference between the population mean remodeling
costs for the two types of projects.
b. Develop a 90% confidence interval for the difference between the two population
means.