What is the purpose of a "test statistic" in hypothesis testing?
a) To calculate the sample size
b) To compare the observed data to what is expected under the null hypothesis
c) To determine the sample mean
d) To find the standard deviation
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What is the purpose of a "test statistic" in hypothesis testing?
a) To calculate the sample size
b) To compare the observed data to what is expected under the null hypothesis
c) To determine the sample mean
d) To find the standard deviation