Question

Jack is hired by a company to see if a new product not yet on the market, Topocal, will cause hair to grow on the heads of bald men. He recruits one thousand bald men, and randomly divides them into two groups: Five hundred men in group A rub Topocal on their heads everyday, and five hundred men in group B rub water from an unmarked bottle on their heads (a placebo) everyday. After six months, Jack finds that there has been hair growth in 7% of group A, and 2% of group B. a) What is the control group? b) what is the experimental group? c)what type of study is this?  d) is this study statistically significant?  .  e) What is the target population to which we hope to apply the results of this study  ?

Answer 1

Control group is group B(who were asked to rub water on their head).Experiement group is group A, who were exposed to the treatment of rubbing Topocal on their head everyday.This is an experimental research design where Independent variable is the product Topocal and dependent variable is the growth of hair on the subject's head. This is a quantitative study, which is statistically significant as the result affirms the hypothesis, which states that use of the Topocal oil will increase the growth of hair on the head among the population. The target group which we hope to apply the result of this study is bald men or men with hair growth problem.

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