While watching a television show, you hear one of the characters, a physician, talking about narcotic analgesics. What is another name for these drugs?

The rates of autism are highest in:

a. North America b. Asia c. Europe d. The rates are consistent in Asia, Europe and North America.

A major concern survey researchers have about samples is whether or not the samples are __________ the population

a. familiar with b. knowledgeable about c. identical to d. representative of