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Given the sample data.
x: 21, 17, 13, 32, 25
(a) Find the range.
(b) Verify that Σx = 108 and Σx2 = 2,548. (For each answer, enter an exact number.)
Σx =
Σx2 =
(c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s and sample standard deviation s. (For each answer, enter a number. Round your answers to two decimal places.)
s2 =
s =
(d) Use the defining formulas to compute the sample variance s2 and 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 all x values. Compute the population variance σ2 and population standard deviation σ. (For each answer, enter a number. Round your answers to two decimal places.)
σ2 =
σ
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