Chapter 4, Problem 23SP

For each of the following, indicate the conditions of the independent variable, the scores from which variable to analyze, whether it is appropriate to compute the mean and standard deviation, and the type of graph you would create.

(a) We test whether participants laugh longer (in seconds) at jokes told on a sunny or a rainy day.

(b) We compare groups who have been alcoholics for 1, 3, or 5 years. In each, we measure participants’ income.

(c) We count the number of creative ideas produced by participants who slept either 6, 7, or 8 hours the night before.