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? ? ? a secure http://ngcengage.com/static/nb evo/index.html?deploymentld-548153 18055469869027090848 MINDTAP Complete: Chapter 9 Problem Set Attempts:2 Average: 2/4 6. Factors that influence a hypothesis test Suppose you conduct a hypothesis test about a population mean when the standard deviation is unknown by calculating a t statistic and determining whether to reject the null hypothesis. Assume that your t statistic is a positive value and that you will reject the null hypothesis when t is very large. For each of the potential changes to the components of your study design or the results listed below, determine the change to the t statistic, and then select "Increases," "Decreases,"or "Stays the same" from the dropdown menu in the right-hand column. Change in Study Design or Results An increase in the significance level (such as using ? .05 instead of ? A decrease in the sample standard deviation (s) A decrease in the obtained difference (M-) A switch from using a one-tailed test to a two-tailed test The t statistic .01)

Explanation / Answer

Increase in significance level -> stays the same
Decrease in sample standard deviation -> increases
A decrease in the obtained difference -> decreases
A switch from a one tailed to a two tailed test -> stays the same

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