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.
(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.
(c) What is the test statistic for the difference in the two means?

Kitchen Master Bedroom
25.2 18.0
17.4 22.9
22.8 26.4
21.9 24.8
19.7 26.9

Kitchen Master Bedroom
23.0 17.8
19.7 24.6
16.9 21.0
21.8 23.6