Randomly selected 120120 student cars have ages with a mean of 7.57.5 years and a standard deviation of 3.63.6 years, while randomly selected 9595 faculty cars have ages with a mean of 66 years and a standard deviation of 3.53.5 years. 1. Use a 0.050.05 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 9595% confidence interval estimate of the difference μ1−μ2μ1−μ2, where μ1μ1 is the mean age of student cars and μ2μ2 is the mean age of faculty cars. <(μ1−μ2)<<(μ1−μ2)<
Randomly selected 120120 student cars have ages with a
1. Use a 0.050.05 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 9595% confidence
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