ck to Assignment tempts: Keep the Highest: 0.5 Factors that influence a hypothes

Question

ck to Assignment tempts: Keep the Highest: 0.5 Factors that influence a hypothesis test Aa Aa uppose you conduct a hypothesis test about a population mean when the standard deviation is known (a "z test"?) by lculating a z statistic and determining whether to reject the null hypothesis. Assume that your z statistic is a. ositive value and that you will reject the null hypothesis when z is very large. Listed below are possible changes to e study desig ame for each of these changes. Use the dropdown menus in the right-hand column to indicate your choice. n or to the results of the study. Determine whether the z statistic increases, decreases, or stays the Change in Study Design or Results A decrease 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 standard deviation (o) The z statistic Suppose you fail to reject the null hypothesis. Then, the results of your study are

Explanation / Answer

Solution:-
-> A decrease in the obtained difference (M - ?) = decreases the Z statistic

-> A decrease in the sample size (n) = decreases the Z statistic

-> A switch from using a two-tailed test to a one-tailed test = Z statistic stays the same

-> A decrease in the population standard deviation (sigma) = increses

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