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BESC 3010 Ch8- Questions & Answers
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BESC 3010 Ch8- Questions & Answers
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BESC 3010 Ch8- Questions & AnswersWhen the mean of the population that a sample comes from does not differ from the general
population but the sample mean is nonetheless significantly different from the general
population, then... Correct Ans-A type I error has occurred
If a researcher is comparing a sample mean to a population mean and gets Cohen's d = -2.0, this
means that... Correct Ans-the sample mean is two standard deviations below the population
mean.
If a researcher is using alpha = .05 and gets a p-value for the z-test of p = .02, then... Correct
Ans-the results are unlikely to occur by chance if the null hypothesis is true.
If a research conducts a z-test and does not reject the null hypothesis, then... Correct Ans-
None of the other choices is correct.
A researcher who wants to use a z-test to compare a sample mean to a population mean must
first... Correct Ans-know the population standard deviation.
If you draw a picture of the null distribution with the critical values and regions of rejection
marked, then the alpha level is represented by... Correct Ans-the proportion of the
distribution in the regions of rejection.
If a researcher believes that the null hypothesis is false and wants to have the greatest chance
of rejecting it with their study, then which of the following would make it more likely that the
null hypothesis would be rejected? Correct Ans-increasing n
If a researcher used a one-sample z-test to determine whether an experimental group was
different from a general population, what she would actually be testing is... Correct Ans-
whether their means are different.
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