Given the sample data. x: 21, 17, 15, 30, 27 (a) Find the range. (Enter an exact number.) (b) Verify that Ex = 110 and Ex2 = 2,584. (For each answer, enter an exact number.) Ex = Ex2 = (c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s2 and sample standard deviation s. (For each answer, enter a number. Round your answers to two decimal places.) S = (d) Use the defining formulas to compute the sample variance s2 and sample standard deviation s. (For each answer, enter a number. Round your answers to two decimal places.) (e) Suppose the given data comprise the entire population of all x values. Compute the population variance 2 and population standard deviation o. (For each answer, enter a number. Round your answers to two decimal places.) 62 =