Card 2 / 9: In this study, the researchers found that, on average, those on the all?-beet diet lost an average of 4.5 pounds with a standard deviation of 4.0 pounds, compared to those on the traditional diet, who lost an average of 4.6 pounds, with a standard deviation of 4.9 pounds. If the statistical test comparing weight lost between the two groups had a statistically significant result, what would you conclude about the study?
A)
The study had inadequate power.
B)
The study had an inadequate sample size.
C)
The study has a type?-I error rate <0.05.
D)
The p?-value is <0.05.
E)
The results may be clinically significant, but not statistically significant.
Answer:
D) The p?-value is <0.05.
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Epidemiology Hypothesis Testing & P-values
Author:
Dr.Janet ForresterProfessor
Tufts University School of Medicine
USA
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