Question

1. Suppose we are interested in comparing domestic and foreign cars. The following data is provided:

Gender	Domestic	Foreign
Sample Size	20	22
Average MPG	20.7	24.94
Sample Standard Deviation	2.86	4.86

1. What is the 99% confidence interval for the difference between the average for domestic and foreign?
2. What is the test statistic for the difference for domestic and foreign?

Answer 1