Over the years, the mean customer satisfaction rating at a local restaurant has been 85. The restaurant was recently remodeled, and now the Espanol management claims the mean customer rating, , is not equal to 85. In a sample of 42 customers cholen at random, the mean customer rating is 84.1. Assume that the population standard deviation of customer ratings is 5.2. Is there enough evidence to support the claim that the mean customer rating is different from 857 Perform a hypothesis test, using the 0.05 level of significance. (a) State the null hypothesis Ho and the alternative hypothesis H1- H OO Ho: 0 H: 020 0-0 0+0 X 5 (b) Perform a hypothesis test. The test statistic has a normal distribution (so the test is a "Z-test"). Here is some other information to help you with your test. . Zo.025 is the value that cuts off an area of 0.025 in the right tail. x u . The test statistic has a normal distribution and the value is given by z = Standard Normal Distribution Step 1: Select one-tailed or two-tailed. One-tailed 03- Two-tailed Check Save For Later Submit Assignment