People were recruited for a study on weight loss, in which participants were randomly assigned to one of four groups. Group 1 was given exercise instructions but no dietary instructions, group 2 was given dietary instructions but no exercise instructions, group 3 was given both exercise and dietary instructions, and group 4 was given neither exercise nor dietary instructions. The researchers have many questions, but one goal is to estimate how much more weight was lost on average by people who were given exercise instructions, as opposed to those who weren€™t.

We have learned a lot of methods in this course, some of which are given below. State which statistical method would be most appropriate for the given question or situation.

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Interval for a Proportion Interval for a Mean Interval for Difference in Proportions Interval for Difference in Means Interval for Correlation Test for a Proportion Test for a Mean Test for Difference in Proportions Test for Difference in Means Test for Correlation Chi-Square Goodness of Fit Chi-Square Test for Association ANOVA for Difference in Means Simple Linear Regression Multiple Regression