Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 15

Basic Computation: Variance, Standard Deviation Given the sample data

(a) Find the range.
(b) Verify that x = 110 and x 2 = 2568.
(c) Use the results of part (b) and appropriate computation formulas to compute the sample variance s 2 and sample standard deviation s.
(d) Use the defining formulas to compute the sample variance s 2 and sample standard deviation s.
(e) Suppose the given data comprise the entire population of all x values. Compute the population variance 2 and population standard deviation .