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 finding best predicts poor outcome in acute pancreatitis at admission?
ARanson score >3
BSerum lipase >1000
CBlood glucose >200
DPleural effusion
Correlation between height and weight is measured by?
ACoefficient of variation
BRange of variation
CCorrelation coefficient
DNone of the options
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