Having carried out the study of Exercise 15.66, the investigator decided to take a second independent random sample of one student from each of the
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a. Prepare the analysis of variance table.
b. Test the null hypothesis that the population mean grade point averages are the same for all three income groups.
c. Test the null hypothesis that the population mean grade point averages are the same for all three SAT score groups.
d. Test the null hypothesis of no interaction between income group and SAT score.
Inconme Group Sat Score Very high High Moderate High 3.9 3.2 2.7 Moderate 3.7 3.6 3.0 Low 3.8 3.4 2.8
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Data Sat High Moderate Low Very 37 36 36 Very 39 37 38 High 34 35 32 High 32 36 34 Mod... View full answer
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Authors: Paul Newbold, William Carlson, Betty Thorne
8th Edition
0132745658, 978-0132745659
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