Arithmetic average is to _____ as score occurring with the greatest frequency is to _____

The 16th century European physician Paracelsus, and later Dr. Thomas Sydenham promoted the use of

A. heroin. B. laudanum. C. opium smoking. D. pure codeine.

In the 1800s, an increase in social problems among young people may have been due in part to

a. moving to the cities with no family ties. b. the advent of social agencies such as the YWCA. c. a decrease in school attendance. d. an increase in agricultural industry.