Question: a. A statistics practitioner wishes to test the following hypotheses: H0: = 600 H1: < 600 A sample of 50 observations yielded the

a. A statistics practitioner wishes to test the following hypotheses:

H0: µ = 600

H1: µ < 600

A sample of 50 observations yielded the statistics x̄ = 85 and s = 45. Calculate the test statistic of a test to determine whether there is enough evidence at the 10% significance level to infer that the alternative hypothesis is true.

b. Repeat part (a) with x̄ = 590.

c. Repeat part (a) with x̄ = 595.

d. Describe the effect of increasing the sample mean.

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