Needing help with this practice question.

Recall that "very satised\" customers give the XYZBox video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ- Box exceeds 42. Click here for the Excel Data File (a) Letting [.1 represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis H0 and the alternative hypothesis Ha needed if we wish to attempt to provide evidence supporting the claim that u exceeds 42. m-m (b) The random sample of 65 satisfaction ratings yields a sample mean of Tc = 42.954. Assuming that 0 equals 2.64, use critical values to test Ho versus Ha at each of o = .10, .05, .01, and .001. (Round your answer z_05 to 3 decimal places and other z-scores to 2 decimal places.) Rejection points (c) Using the information in part (b). calculate the p-value and use it to test Ho versus Ha at each of a = .10, .05, .01. and .001. (Round your answers to 4 decimal places.) -1o.oos.oo1 _ (cl) How much evidence is there that the mean composite satisfaction rating exceeds 42