A Researcher Is Interested in the Social Behavior of Mice

question 13

Multiple Choice

A researcher is interested in the social behavior of mice. He hypothesizes that mice from Strain A will be more social than mice from Strain B, and Strain B will be significantly more social than mice from Strain C. Mice from each of the three different strains (20 mice in each strain) are raised in a laboratory. The mice are group housed with members of its own strain. All the mice receive the exact same amount of food, water, and light over the first 10 weeks of life. At 11 weeks of age, each mouse is placed in a cage with a novel mouse from his own strain. The mouse's investigatory behavior toward the other mouse is timed for 10 minutes.
If the experimenter does decide to run this experiment again, what might the experimenter do to improve the chances of finding meaningful results?

• A) double the number of mice in the isolated condition
• B) use an analysis of variance instead of a t test
• C) calculate an r-family measure of effect size
• D) calculate the power given the anticipated means and standard deviations

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