A group of 80 people is being studied to determine the effect of diet modification on cholesterol levels. To compare the mean cholesterol levels before and after the diet modification in this group, which statistical test should be used?
APaired t-test
BMcNemar test
CChi-square test
DWilcoxon signed-rank test
EIndependent t-test
Which of the following statements about screening tests is correct?
ASensitivity is 1 - False negative rate
BSensitivity is 1 - False positive rate
CPost-test probability is only influenced by pre-test probability
DNone of the options is correct.
For testing the statistical significance of the difference in heights among different groups of school children, which statistical test would be most appropriate?
AStudent's t test
Bchi-square test
CPaired 't' test
DANOVA
+ 7 more in the PDF
Browse all chapters