With regard to evaluation designs, which of the following statements is not accurate?
a. variation in the levels of treatment delivered by a program can be a major threat to
the validity of even randomized evaluation studies
b. uncontrolled variation in treatment is equivalent to unreliable measurement of the
independent variable
c. controlled variation in treatment represents a threat to generalizability
d. varying degrees of participation by clients in a program will impact the outcome
Which of the following is the best example of the use of judgmental sampling?
a. exit polls on election days
b. surveys of all police chiefs in America
c. interviews of female inmates in the Los Angeles County Jail
d. households participating in the National Crime Victimization Survey