The warehouse manager at an office supply company wanted to determine whether the average customer bought more than 50 reams of paper per month. She randomly selected 20 monthly shipments and identified the total number of reams of paper shipped to each customer. The owner conducts a one-mean hypothesis at the 5 % significance level, to test if the mean number of reams of paper bought is greater than 50 . (a) H 0 : = 50 ; H a : > 50 , which is a right-tailed test. (b) Reams of paper purchased is given below. Use Excel to test whether the mean is greater than 50 . Identify the test statistic, t , rounding to two decimal places, and p-value, rounding to three decimal places from the Excel output. 50 53 59 46 49 66 61 42 51 59 64 49 61 43 57 49 59 60 61 54