Asked by Jo
Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven, have observed the following speed (mph) measurements for two random samples of vehicles.
Alone With Pass
64 44
50 52
71 54
55 48
67 69
61 67
80 54
56 57
59 58
74 51
62
67
a. What are the null and alternative hypotheses for this test?
b. Use ANOVA and the 0.025 level of significance in testing the null hypothesis identified in part (a).
c. For each sample, construct the 95% confidence interval for the population mean.
Alone With Pass
64 44
50 52
71 54
55 48
67 69
61 67
80 54
56 57
59 58
74 51
62
67
a. What are the null and alternative hypotheses for this test?
b. Use ANOVA and the 0.025 level of significance in testing the null hypothesis identified in part (a).
c. For each sample, construct the 95% confidence interval for the population mean.
Answers
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