Answer:
Explanatio n:Acorporation conducted a study to examine the effect of regular exercise on the productivity of their employees, and which of their 5 departments would benefit the most from an exercise program. from an initial sample of 30 employees from each of their 5 departments, they randomly selected 15 from each group of 30 to undertake a strict exercise regime. the remaining 15 employees in each group were left to go about their lives normally. the above study is best described as: