In a cholesterol drug study, 20 patients were enrolled. They were divided into 1
ID: 3300589 • Letter: I
Question
In a cholesterol drug study, 20 patients were enrolled. They were divided into 10 groups, each of which has two males or two females with similar physiological measures. Within each group, the drug and a placebo were randomly assigned to the two patients. After the study, their cholesterol levels were measured, and produced the following ANOVA table. Conduct appropriate tests to see whether the blocks have impact on the cholesterol levels and whether the drug is effective compared to the placebo with Type I error rate controlled at 0.05. Notice that you may need to conduct multiple tests to reach your conclusion.Explanation / Answer
the complete anova table will be:
For treatment:
Fcritical=F(0.05,1,9)=5.117
Fcalculated=7.0615
Fcalculated>Fcritical (reject null hypothesis)
hence we can say that drug has no efective at 0.05 level of significance(Fcalculated>Fcritical)
For Block:
Fcritical=F(0.05,9,9)=3.178893
Fcalculated=2.84
Fcalculated>Fcritical (accept null hypothesis)
Hence we can say that the blocks have impact on the cholestrollevels
Source df SS MS F Treatment 1 62 62 7.0615 Block 9 225 25 2.84 Error 9 79 8.7777 Total 19 366