Question

I don't know why but question 2 just won't work.

(1 point) Randomly selected 20 student cars (population 1) have ages with a mean of 8 years and a standard deviation of 3.4 years, while randomly selected 22 faculty cars (population 2) have ages with a mean of 5.7 years and a standard deviation of 3.3 years. (For the purposes of this exercise, the two populations are assumed to be normally distributed.) 1. Use a 0.03 significance level to test the claim that student cars are older than faculty cars. The test statistic is 2.224 The P-value (using the approximate number of degrees of freedom) is 0.016 Is there sufficient evidence to support the claim that student cars are older than faculty cars? A.Yes B. No 2. Construct a 97% confidence interval estimate of the difference μι approximate value for the number of degrees of freedom.) here els the mean age of student cars and 2 s the mean age of faculty cars. Use the

Answer 1

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