Consumer Reports rated 15 midpriced family sedans and 15 affordable family sedans. The following data show the road-test scores (1 to 100 scale with 100 the highest rating) for the 30 cars (Consumer Reports, February 2008).
Midpriced Family Sedans………………………..Affordable Family Sedans
89………………………………………………………………………….85
88………………………………………………………………………….79
87………………………………………………………………………….78
86………………………………………………………………………….77
84………………………………………………………………………….76
77………………………………………………………………………….75
77………………………………………………………………………….74
75………………………………………………………………………….69
70………………………………………………………………………….69
69………………………………………………………………………….69
64………………………………………………………………………….64
58………………………………………………………………………….62
56………………………………………………………………………….59
48………………………………………………………………………….49
46………………………………………………………………………….44
a. Formulate hypotheses so that if the null hypothesis is rejected, we can conclude that the mean road-test score for midpriced family sedans is significantly greater than the mean road-test score for affordable family sedans. Use α = .05.
b. What is the point estimate of the difference between the mean road-test score for mid priced family sedans and the mean road-test score for affordable family sedans?
c. Compute the p-value for the hypotheses formulated in part (a).
d. Using the p-value computed in part (c) and α = .05, what is your conclusion.
Enjoy 24/7 customer support for any queries or concerns you have.
Phone: +1 213 3772458
Email: support@gradeessays.com