ABSTRACT
If you were hungry between meals, what kind of snack would you prefer: a piece of fruit or a candy bar? Perhaps you would give one answer if the question related to future eating and a different answer if you were offered the snack immediately. Suppose we run an experiment in which we randomly assign people to two groups, both of which will be offered a snack. The independent variable will be the difference in how the snacks will be offered. One group will be asked to choose between two snacks (an apple or a slice of cake) that they would like to receive tomorrow afternoon. The other group will be shown these two options in person and will choose the snack immediately. Our question is whether the snack choices will differ for people who are asked to state a preference for the future versus people who choose the snack immediately. Maybe people are more likely
Introduction One-Sample Proportion Confidence Interval for a
Proportion Goodness of Fit Hypotheses Goodness of Fit Statistic Computing the Chi-Square
Test for Goodness of Fit Goodness of Fit: Assumptions
and Robustness
Chi-Square for Independence
Hypotheses for Chi-Square for Independence
Computing Chi-Square for Independence
Relative Risk Odds Ratios Analysis of Ranks What’s Next
to choose a healthful snack for the future, but an unhealthful snack for immediate consumption.
