Question 2 of 8 Waiters at a restaurant chain earn an average of $256 per shift (regular pay + tips) with a standard deviation of $32. For random samples of 38 shifts at the restaurant, within what range of dollar values will their sample mean earnings fall, with 80% probability? Standard Normal Distribution Table Range: to Round to the nearest centQuestion 3 of 8 Ho: p =0 Hi:p>0 r = 0.454 n = 15 a = 0.005 T-Distribution Table a. Calculate the test statistic. Round to three decimal places if necessary b. Determine the critical value(s) for the hypothesis test. Round to three decimal places if necessary c. Conclude whether to reject the null hypothesis or not based on the test statistic. O Reject O Fail to Reject