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Spring 2012
STAT 512
HW 1
1
Homework 1 (9 pts.)
due Jan. 20
A reminder – Please do not hand in any unlabeled or unedited SAS output. Include in your writeup only
those results that are necessary to present a complete solution (what you want the grader to grade). In
particular, questions must be answered in order (including graphs), and all graphs must be fully labeled
(main title should include the question number, and all axes should be labeled). Don’t forget to put all
necessary information (see course policies) on the first page. Include the SAS input for all questions at
the very end of your homework; this could be important even though it won’t be graded. You will often
be asked to continue problems on successive homework assignments so save all your SAS code.
1. (4 pts.) A regression analysis relating test scores (Y) to training hours (X) produced the following
fitted equation: ś = 25 8 0.5x.
a) What is the fitted value of the response variable corresponding to x = 7?
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 Spring '08
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