There are two restaurants in the shopping centre. Customers are asked to provide an overall evaluation of the service quality from 1 (worst) to 5 (best). The responses are as follows: . (a) State your null and alternative hypotheses, then use a 0.01 significance level to test the hypothesis that the Korean restaurant has higher service quality than the Japanese restaurant. In your answer, include the value of the test statistic and the p-value. . (b) State your null and alternative hypotheses, then use a 0.05 significance level to test the hypothesis that the service quality of the Japanese restaurant and the Korean restaurant have the same variation. In your answer, include the value of the test statistic and the p-value. (10 marks) (

Japanese restaurant N=26 X = 3.39 s=0.97 Korean restaurant N=31 X = 3.97 S=0.63