17. Factors that influence a hypothesis test Aa Aa Suppose you conduct a hypothe

Question

17. Factors that influence a hypothesis test Aa Aa Suppose you conduct a hypothesis test about a population mean when the standard deviation is known (a "z test") by calculating a z statistic and determining whether to reject the null hypothesis. Assume that your z statistic is a positive value and that you will reject the null hypothesis when z is very large. Listed below are possible changes to the study design or to the results of the study. Detemine whether the z statistic increases, decreases, or stays the same for each of these changes. Use the dropdown menus in the right-hand column to indicate your choice. The z statistic Change in Study Design or Results An increase in the obtained difference (M - H) A decrease in the sample size (n) A switch from using a two-tailed test to a one-tailed test A decrease in the population variance (a2) Increases Decreases Stays the same Suppose you fail to reject the null hypothesis. Then, the results of your study are

Explanation / Answer

the result of your study not statistically significant.

change in study z statistic increase in obtained differnce increases increase in sample size increases switch stays the same decrease in variance increases

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