Dr. Galbraith is comparing the number of words recalled by preschoolers, kindergartners, and 1st graders. The statistical test he should use for this study is a multiple regression analysis.

The average amount that each individual score varies from the mean of the set of scores is called the mode.

A quota sample would be better than a stratified sample in more accurately representing the population.

At the onset, you need a complete list of individuals in order to do a cluster sample.

62-66. Please select the best answer.

A correlation of .21 is stronger than a correlation of -.33.

Participants were not told the true purpose of the study.

When a confound is found within an experiment, the external validity of the experiment is challenged.

You are interested in studying a group of people who make up just a small fraction of the population but that are theoretically interesting. Which type of probability sample would BEST allow you to sample them?

Which type of hypothesis represents a statement of equality?