The effect of outliers. We know that outliers can strongly

Chapter , Problem 16.58

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The effect of outliers. We know that outliers can strongly influence statistics such as the mean and the least-squares line. Example 7.7 (page 429) describes a matched pairs study of disruptive behavior by dementia patients. The differences in Table 7.2 show several low values that may be considered outliers. MOON (a) Bootstrap the mean of the differences with and without the three low values. How do these values influence the shape and bias of the bootstrap distribution? (b) Give the BCa confidence interval from both bootstrap distributions. Discuss the differences.

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