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A sample of 80 items provided a mean of x =33. The standard deviation of the entire population is given to be 15. The hypotheses

A sample of 80 items provided a mean ofx=33.

The standard deviation of the entire population is given to be 15. The hypotheses are given below.

H₀:=32

H_a:32

Recall that the test statistic,z, for a hypothesis is calculated as follows wherex

is the sample mean,₀

is the hypothesized population mean,is the population standard deviation, andnis the sample size.

X - Ho Z =

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