A sample of 77 cars owned by students had an average age of 8.94 years. A sample of 77 cars owned by faculty had an average of 8.32 years. Assume that the population standard deviation for cars owned by students is 2.59 years and 2.66 years for faculty. Determine the 95% interval for the differences between the true mean ages for cars owned by students and faculty. 1. Construct 95% confidence interval. Round 2 decimal places 2. Find the point estimate for the true difference between the population means. 3. Calculate margin of error of a confidence interval for the differences between the 2 population means.

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