Question

Johnson is hired by a company to see if a new product, 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 (group
a.rub topocal on their scalps each day; the other five hundred (group
b.rub a standard skin lotion on their scalps each day. after two months, johnson checks to see what the results have been. he finds that there has been hair growth in 7 percent of group a and in 2 percent of group
b. 
what is the sample?

Answer 1

The sample is the 1,000 men tested in two groups. The population would be the broad class of balding men. All 1,000 men are considered a part of the sample regardless of which group they were in because each of the 1,000 men is representing an equal portion of the population.