Assume that z is the test statistic and calculate the value of z for each of the

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Assume that z is the test statistic and calculate the value of z for each of the following:

a. Ho:   51,   4.5, n  40, x  49.6

b. Ho:   20,   4.3, n  75, x  21.2

c. Ho:   138.5,   3.7, n  14, x  142.93

d. Ho:   815,   43.3, n  60, x  799.6

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