Johnson Is Hired by a Company to See If a New

Multiple Choice

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 men (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 if Johnson had started with 2,000 bald men (1,000 in each group) and got the same 7 and 2 percent figures? Would this have made any difference for the significance of Johnson's results?

A) Yes: It changes them from insignificant to significant.
B) Yes: It changes them from significant to insignificant.
C) No: They were insignificant before, and this leaves them that way.
D) No: They were significant before, and this leaves them that way.