Question

Given the sample data. x: 21 17 15 32 25 (a) Find the range. (b) Verify...

Given the sample data. x: 21 17 15 32 25

(a) Find the range.

(b) Verify that Σx = 110 and Σx2 = 2,604. Σx = Σx2 = (

c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s2 and sample standard deviation s. (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. (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. (Round your answers to two decimal places.)

σ2 =

σ =

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