mgsc 291 exam 2 professor Hendrix questions with answers

mgsc 291 exam 2 professor Hendrix |\ |\ |\ |\ |\ |\




questions with answers |\ |\




The P-value of a hypothesis test is the probability of seeing a test
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statistic that extreme or more... - CORRECT ANSWERS ✔✔in the
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direction of the alternative hypothesis if the null is true
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The interpretation of a hypothesis test result is about the -
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CORRECT ANSWERS ✔✔parameter |\ |\




what is used to form the interpretation of a hypothesis test
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result? - CORRECT ANSWERS ✔✔statistic
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power: - CORRECT ANSWERS ✔✔reject the null when the null is
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false


type 1 error: - CORRECT ANSWERS ✔✔reject the null when the
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null is true
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type 2 error: - CORRECT ANSWERS ✔✔fail to reject the null when
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it is false
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the higher the confidence level, - CORRECT ANSWERS ✔✔the
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wider the confidence interval
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, increasing the sample size will make the confidence interval... -
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CORRECT ANSWERS ✔✔narrower |\ |\




how can you increase power? - CORRECT ANSWERS ✔✔increase
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sample size |\




you conducted a statistical hypothesis test and it results in a P-
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value of 0.10 with an α of 0.05. You should... - CORRECT
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ANSWERS ✔✔Fail to reject HO (do not find for HA)|\ |\ |\ |\ |\ |\ |\ |\ |\




if there is no zero in the confidence interval: - CORRECT
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ANSWERS ✔✔there is probably a difference |\ |\ |\ |\ |\




You study whether the percent of students who go on to have
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successful careers is higher than 75%. Your P-value for the
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hypothesis test is 0.005. You should conclude: - CORRECT
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ANSWERS ✔✔There is strong evidence the percent of students
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who are successful is higher than 75%.
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In regression and ANOVA, you can check which assumption(s)
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with a residuals versus predicted plot? - CORRECT ANSWERS
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✔✔a. Errors have mean 0
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b. Errors have equal variance
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In regression and ANOVA, you can check which assumption(s)
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with a QQ plot of the residuals? - CORRECT ANSWERS
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✔✔normality (normal if linear) |\ |\ |\