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18 November 2001
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Q SCI 381 A
Due: 5:00 pm, Monday, November 26,
2001
Work the following problems from your text.
1. Section 8.1, Page 374, #10
2. Section 8.1, Page 374, #12
3. Section 8.1, Page 377, #22
4. Section 8.1, Page 377, #24
5. Section 8.1, Page 378, #26
6. Section 8.2, Page 385, #10
7. Section 8.2, Page 385, #14
8. Section 8.2, Page 388, #22
9. Section 8.2, Page 388, #24
10. Section 8.3, Page 396, #16
11. Section 8.3, Page 398, #20
12. Section 8.3, Page 399, #24
13. Section 8.4, Page 405, #10
14. Section 8.4, Page 406, #14
15. Section 8.4, Page 406, #18
Extra Credit (10pts):
Experiment with the java-based interactive t-test program at the following website:
http://nimitz.mcs.kent.edu/~blewis/stat/tTest.html
a) run a t-test with at least 3 example data sets and summarize the test findings in a 1 page summary. Include p values and degrees of freedom for each analysis.
b) Enter your own two sets of data either from a problem in the book or from your own source and do the analysis and include this in your write-up.
c) Notice that the computation includes a test for equality of variance (which we will do in Chapter 10). Since we assume equality of variance in our t-test we may be doing illegal t-tests. How did the examples and your made-up problem fare regarding equality of variance?
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