BESC 3010 Ch8 Test Questions with Correct Answers
When 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... - Answer-A type I error has occurred
If a resear...
BESC 3010 Ch8 Test Questions
with Correct Answers
When 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... - Answer-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... - Answer-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... -
Answer-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... - Answer-
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... - Answer-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... - Answer-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? - Answer-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... -
Answer-whether their means are different.
When calculating an effect size for the z-test... - Answer-it is most common to use
Cohen's d
A Type I error is also called... - Answer-a false positive
The z-test is appropriate when... - Answer-the researcher knows the population mean
and variance/standard deviation
If a researcher wants to test whether an experimental group is different from the general
population, the she would test... - Answer-the null hypothesis of no difference between
the group and the population.
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