Given the sample data.

x:23,17,15,30,25

(a)Find the range. (Enter an exact number.)

(b)Verify thatx=110andx²=2,568. (For each answer, enter an exact number.)

(c)Use the results of part (b) and appropriate computation formulas to compute the sample variances²and sample standard deviations. (For each answer, enter a number. Round your answers to two decimal places.)

(d)Use the defining formulas to compute the sample variances²and sample standard deviations. (For each answer, enter a number. Round your answers to two decimal places.)

(e)Suppose the given data comprise the entire population of allxvalues. Compute the population variance²and population standard deviation. (For each answer, enter a number. Round your answers to two decimal places.)