Author Question: A researcher obtains chemistry achievement test scores from a group of high school students who have ... (Read 261 times)

littleanan · **on:** Jun 20, 2018

A researcher obtains chemistry achievement test scores from a group of high school students who have had laboratory experience and a group who have not. She recognizes the need to control for the variable intelligence in his study. Identify the type of control technique illustrated by the following procedures. The effect of intelligence on the test scores is controlled with a statistical procedure.

a. match
b. use analysis of covariance
c. use a homogeneous group
d. add intelligence as an additional independent variable

Question 2

A pretest may be used in an experiment

a. as a matching variable. c. when change is being investigated.
b. to assess group equivalence. d. All of these are true.