13. The table below summarizes baseline characteristics on patients participating in a clinical trial.
Characteristic Placebo (n=125) Experimental (n=125) P
Mean (+ SD) Age 54 + 4.5 53 + 4.9 0.7856
% Female 39% 52% 0.0289
% Less than High School Education 24% 22% 0.0986
% Completing High School 37% 36%
% Completing Some College 39% 42%
Mean (+ SD) Systolic Blood Pressure 136 + 13.8 134 + 12.4 0.4736
Mean (+ SD) Total Cholesterol 214 + 24.9 210 + 23.1 0.8954
% Current Smokers 17% 15% 0.5741
% with Diabetes 8% 3% 0.0438
a) Are there any statistically significant differences in baseline characteristics between treatment groups? Justify your answer.
b) Write the hypotheses and the test statistic used to compare ages between groups. (No calculations - just H0, H1 and form of the test statistic)
c) Write the hypotheses and the test statistic used to compare % females between groups. (No calculations - just H0, H1 and form of the test statistic)
d) Write the hypotheses and the test statistic used to compare educational levels between groups. (No calculations - just H0, H1 and form of the test statistic)