In the past a chemical plant has produced an average of 1, 100 lb of chemical pe

Question

In the past a chemical plant has produced an average of 1, 100 lb of chemical per day A random sample of 260 operating days from the past year shows that x = 1.040. The plant manager wishes to test whether the average daily production x has dropped significantly over the past year. Give the appropriate null and alternative hypotheses. If z is used as a test statistic, determine the rejection region corresponding to a level of significance of alpha = .05. Do the data provide sufficient evidence to indicate a drop in average daily production?

Explanation / Answer

=22.36

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