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Unformatted text preview: Statistics 512: Problem Set No. 4 Due September 25, 2009 1. Consider the following SAS output giving 5 confidence intervals for the mean of Y . If you wanted to guarantee that joint coverage of the five confidence intervals was at least 95%, what confidence level would you use when forming each interval, using the Bonferroni correction? Compute this adjusted confidence interval for the mean of Y when X = 5. (Note that some observations have been omitted from the output.) Analysis of Variance Sum of Mean Source DF Squares Square F Value Pr > F Model 1 16183 16183 805.62 <.0001 Error 16 321.39597 20.08725 Corrected Total 17 16504 Root MSE 4.48188 R-Square 0.9805 Dependent Mean 64.00000 Adj R-Sq 0.9793 Coeff Var 7.00294 Parameter Estimates Parameter Standard Variable DF Estimate Error t Value Pr > |t| Intercept 1-2.32215 2.56435-0.91 0.3786 x 1 14.73826 0.51926 28.38 <.0001 Output Statistics Dep Var Predicted Std Error Obs x y Value Mean Predict 95% CL Mean Residual 3 5 78.0000 71.3691 1.08781....
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This note was uploaded on 03/15/2012 for the course STAT 512 taught by Professor Staff during the Fall '08 term at Purdue.
- Fall '08