10. We have a group of 120 men and women, and we would like to determine the effectiveness
of two different weight loss supplements, pill A and pill B, both of which offer a 25
milligram (mg) pill and a 50 mg pill. It was decided that 40 subjects would be randomly
assigned to pill A (half of which would be given the 25 mg pill and the other half the 50 mg
pill), 40 subjects would be randomly assigned to pill B (half of which would be given the 25
mg pill and the other half the 50 mg pill), and 40 subjects would be randomly assigned to be
given a placebo with no active weight loss ingredient. Subjects were unaware which
treatment they were receiving. Subjects would be weighed initially prior to being
administered the treatment, and their weight would be recorded at the end of a 6-month
period after having taken the pill, and the results would be used for comparative purposes.
a) Identify the experimental units, factors, levels, and treatments.