17. Claim: The average cost to repair washing machine A is thesame as the average cost to repair washing machine B. Test at α =0.05 Data: A sample of 14 washing machine A’s have an averagerepair cost of $208 and a standard deviation of $25. A sample of 16washing machine B’s has an average repair cost of $221 and astandard deviation of $29.
Assume that the population standard deviations for repair costs arethe same for each
(a) Are these data statistically signiï¬cant evidence to support theclaim?
(b) Are these data statistically signiï¬cant evidence to refutethe claim?
