Author Question: The two characteristics that distinguish experimental designs from nonexperimental designs are A) ... (Read 43 times)

D2AR0N · **on:** Aug 4, 2018

The two characteristics that distinguish experimental designs from nonexperimental designs are

A) randomization and sample size.
B) sample size and control groups.
C) control groups and level of measurement.
D) control groups and randomization.

Question 2

Random assignment

A) increases confidence that the groups are the same at the start of the study.
B) is the best way to increase statistical power.
C) is difficult to include in experimental designs.
D) maximizes experimental variance.