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Unformatted text preview: STATISTICS 500 Fall 2009 Homework 1 DUE DATE: on campus Friday, 4 Sept 2009, in lecture (11 am) off campus Tuesday, 8 Sept 2009, by 4 pm to Nicole Rembert, email: rembeall@iastate.edu or FAX: 5152944040 (please include cover page with Stat 500 / Nicole Rembert). 1. Designbased pvalues and confidence intervals: I had the computer repeat the sampling exercises from lab a total of 500 times. The values are in lab1bigex1.txt and lab1bigex2.txt in the data files section of the class web site. The first file has results from the randomization (exercise 1) and the second has results from the bootstrap (exercise 2). The data values have been sorted for your convenience. Remember the real data had an observed difference of 4.49 and an observed ratio of 3.84. (a) Using the appropriate sets of 500 computergenerated values, calculate the onesided p values for testing Ho: difference = 0 and Ho: ratio = 1. In both cases, more extreme events are larger values. (b) The lab notes for week 1 describe how to calculate the twosided pvalue, but we did not do it during lab. Use the appropriate sets of 500 computergenerated values to compute the twosided pvalues for testing Ho: difference = 0 and Ho: ratio = 1.the twosided pvalues for testing Ho: difference = 0 and Ho: ratio = 1....
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This note was uploaded on 02/11/2012 for the course STAT 500 taught by Professor Staff during the Fall '08 term at Iowa State.
 Fall '08
 Staff
 Statistics

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