A doctor gives 60 patients a drug and the symptoms of all but 6 go away within three days. The doctor concludes that the drug effectively reduces symptoms in most patients. Which statement presents the best critique of the study?
a. the correlation is negative, so we can't interpret the results
b. we didn't have a comparison group so we can't interpret the benefit
c. because the study had no construct, results are uninterpretable
d. because the study was cross-sectional, results were likely due to chance
Ans: b. we didn't have a comparison group so we can't interpret the benefit
Psychology
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Calculate the degrees of freedom for a single-sample t test with 18 subjects
a. 17 b. 18 c. 16 d. Cannot be determined
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The spread of the averages around the average of averages in a sampling distribution is called the ____
a. standard deviation b. variance c. standard error d. sampling error
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