Author Question: What is the primary goal for randomly assigning participants to treatment conditions in an ... (Read 138 times)

soccerdreamer_17 · **on:** Jun 19, 2018

What is the primary goal for randomly assigning participants to treatment conditions in an experiment?

a. Increase the ability to generalize the results.
b. Avoid selection bias.
c. Ensure that the individuals in the sample are representative of the individuals in the population.
d. Minimize the likelihood that a participant characteristic becomes a confounding variable.

Question 2

Assume that the scores on a test of anxiety are normally distributed. Assume that the mean score is 6 and the standard error is 0.25 . About 68 of the scores will fall in the range ____.

a. 5.75 to 6.25
b. 5.5 to 6.5
c. 5.25 to 6.75
d. 5.0 to 7.0