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13. Basic Computation: Variance. Standard Deviation Given the sample data 23 17 15 30 25 (a) Find the range. (b) Verify that S. = 1

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13. Basic Computation: Variance. Standard Deviation Given the sample data 23 17 15 30 25 (a) Find the range. (b) Verify that S. = 1 10 and Ex = 2568. (c) Use the results of part (b) and appropriate computation formulas to com- pute the sample variance s- and sample standard deviation s. (d) Use the defining formulas to compute the sample variance s and sample standard deviation s. (e) Suppose the given data comprise the entire population of all .r values. Compute the population variance o' and population standard deviation (r

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