Attempts: Average: /4 5. Factors that influence a hypothesis test Aa Aa Suppose
ID: 3060504 • Letter: A
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Attempts: Average: /4 5. Factors that influence a hypothesis test Aa Aa 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 thern select "Increases," "Decreases," or "Stays the same" from the dropdown menu in the right-hand column. Change in Study Design or Results A switch from using a one-tailed test to a two-tailed test An increase in the sample standard deviation (s) An increase in the significance level (such as using -.05 instead of = .01) A decrease in the sample size (n) The t statistic Increases Decreases Stays the same Flash Player MAC 28,0,0,161 Q3 3.34.1 © 2004-2016 Aplia. All rights reserved. 0 2013 Cengage Learning except as noted. All rights reserved. Grade It Now Save & ContinueExplanation / Answer
t statistic depends on standard deviation, sample mean, population mean and sample size.
Hence,
Switch from one tailed test to two tailed test -----> Stays the same
Increase in s ----> Decreases
Increase in significance level ----> Stays the same
Decrease in sample size ----> Decreases
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