In studies comparing two groups, the parameter of interest is oft en stated as the true difference

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In studies comparing two groups, the parameter of interest is oft en stated as the true difference in the long-run proportions in the two groups. In this study, this is the long run difference in the proportions of men calling the researcher comparing the men crossing the Capilano suspension bridge to the men crossing the wooden bridge. A 95% confidence interval (CI) for this parameter is 0.375 ± 0.35. Explain how the fact that the CI does not include 0 corresponds to the size of the p-value obtained in #8.


In Chapter 5, we will learn how to use the 3S strategy to help us investigate how much evidence the sample data provide to support our conjecture that the long-run probability of men who call is greater for those on the suspension bridge than for those on the wooden bridge. As a result of the simulation analysis method used in Chapter 5 we received a p-value of 0.023.

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Introduction To Statistical Investigations

ISBN: 9781118172148

1st Edition

Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy

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