Bootstrap problems

Bootstrap problems - Bootstrap problems For the first six problems analyze the variables Chlorophyll.a from the Chlorophyll dataset and TcCB from

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Bootstrap problems For the first six problems, analyze the variables Chlorophyll.a from the Chlorophyll.xls dataset and TcCB from the TcCB-Cleanup.xls dataset. 1. For which of these two variables do you expect the confidence intervals from the t distribution to be more reliable? Why? 2. Calculate the bootstrap 95% CI of the mean for each of the variables. Which interval is best in each case? How do the bootstrap CIs compare with the CIs from the t distribution? 3. Bootstrap the standard deviation of each variable. What is the bias in each case? 4. Using 1000 bootstrap replicates, repeat step 3 five times. How much does the bias estimate vary? 5. For one of the variables, repeat step 4 using 100 bootstrap replicates, and using 10,000 bootstrap replicates. 6. What is the approximate bootstrap P value for the null hypothesis that the mean TcCB concentration is greater than or equal to 6? 7. Fit the logistic regression model that relates Willingness To Pay for pharmaceutical
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This note was uploaded on 08/06/2008 for the course ESM 206 taught by Professor Kendall,berkley during the Spring '08 term at UCSB.

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Bootstrap problems - Bootstrap problems For the first six problems analyze the variables Chlorophyll.a from the Chlorophyll dataset and TcCB from

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