Question

Given the sample data. x: 23 17 15 30 27 (a) Find the range. (b) Verify...

Given the sample data.

x: 23 17 15 30 27

(a) Find the range.


(b) Verify that Σx = 112 and Σx2 = 2,672.

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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