A researcher is interested in the effectiveness of a new medication at reducing systolic blood pressure via a new medication in a group of hypertensive patients. The medication has entered the phase II period for clinical trials, and the researcher has determined three doses to test on his participants. Suppose the following ANOVA table summarizes the findings of the study with respect to the four groups (three different doses group and one control group).

a. Write out your null and alternative hypotheses for a one way analysis of variance.

b. Calculate the F-statistics.

c. Assuming the p-value from the F-statistics is greater than the significant level. What does this tell you and what is your conclusion?

d. What is your next step after 9c?

Between Groups Within Groups Total Sum of Squares 2267.6 1478.2 3745.8 df 3 50 53 Mean Square 755.87 29.564