Question: Two new drugs are being tested for their effect on the number of days a patient must remain hospitalized after surgery. A control group is

Two new drugs are being tested for their effect on the number of days a patient must remain hospitalized after surgery. A control group is receiving a placebo, and two treatment groups are each receiving one of two new drugs, both developed to promote recovery. The null hypothesis is that there is no difference between the means. The results of an analysis of variance used to analyze the data are shown here.

One-way ANOVA: Days versus Group Source DF SS MS F P Group 2 11.00 5.50 2.11 0.159 Error 14 36.53 2.61 Total 16 47.53

a. How many patients were there?

b. How does the printout verify that there was one control and two test groups?

c. Using the SS values, verify the two mean square values.

d. Using the MS values, verify the F-value.

e. Verify the p-value.

f. State the decision and conclusion reached as a result of this analysis.

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