Question

Randomly selected 130 student cars have ages with a mean of 7.9 years and a standard deviation of 3.4 years, while randomly selected 65 faculty cars have ages with a mean of 5.7 years and a standard deviation of 3.3 years. 1. Use a 0.02 significance level to test the claim that student cars are older than faculty cars. The test statistic is The critical value is Is there sufficient evidence to support the claim that student cars are older than faculty cars? A. Yes B. No 2. Construct a 98% confidence interval estimate of the difference μ1−μ2, where μ1 is the mean age of student cars and μ2 is the mean age of faculty cars. <(μ1−μ2)

Answer 1