Question

x: 23, 17, 15, 30, 27

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

(b) Verify that Σx = 112 and Σx2 = 2,672. (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 s2 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 deviation s. (For each answer, enter a number. Round your answers to two decimal places.) s2 = s =

(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.)

Answer 1

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