Suppose you look at medical records collected on adolescents in high school in 1970 and in high school in 2007. You should expect these records to show that, compared to the number of high school students who smoke cigarettes in 2010, the number who smoked in 1970 would be:

Question

Quizplus · Accepted Answer

Tobacco smoking by U.S. adolescents showed a sharp decline in the late 1970s; since that time smoking by teenagers has gradually declined.

Suppose You Look at Medical Records Collected on Adolescents in High