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Given the sample data. x: 21 19 13 30 25 (a) find the range (b) verify...

Given the sample data.

x: 21 19 13 30 25

(a) find the range

(b) verify that Ex=108 and Ex^2=2496

(c) use the results of part (b) and appropriate computation formulas to compute the sample variances s^2 and sample standard deviation s (round your answer to two decimal places.)

(d) use the defining formulas to compute the sample variance s^2 and sample standard deviation s. (round your answers to two decimal places)

(e) suppose the given data comprises the entire population of all x values. compute the population variance o^2 and population standard deviation o. (round your answers to two decimal places)

Math   Statistics-And-Probability   
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TOPIC:Range,sample variance and population variance.

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