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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 TcCBCleanup.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.
 Spring '08
 KENDALL,BERKLEY
 Environmental Science

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