hA - Stat 5102(Geyer Spring 2009 Homework Assignment 10 Due...

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Unformatted text preview: Stat 5102 (Geyer) Spring 2009 Homework Assignment 10 Due Wednesday, April 22, 2009 Solve each problem. Explain your reasoning. No credit for answers with no explanation. If the problem is a proof, then you need words as well as formulas. Explain why your formulas follow one from another. 10-1. The URL http://www.stat.umn.edu/geyer/5102/data/prob10-1.txt contains six variables named x1 , x2 , x3 , x4 , x5 , and y . (a) Perform a simple linear regression of y on x1 . (b) Perform a hypothesis test of whether the regression coefficient for x1 is significantly different from zero. (c) Perform a hypothesis test of whether the correlation coefficient of x1 and y is significantly different from zero. (d) Calculate a 95% confidence interval for the true population regression coefficient for x1 . 10-2. The URL http://www.stat.umn.edu/geyer/5102/data/prob10-1.txt contains six variables named x1 , x2 , x3 , x4 , x5 , and y ....
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hA - Stat 5102(Geyer Spring 2009 Homework Assignment 10 Due...

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