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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
38. In an experiment to see whether the amount of cov- erage of light-blue interior latex paint depends either on the brand of paint or on the brand of roller used, 1 gallon of each of four brands of paint was applied using each of three brands of roller, resulting in the following data (number of square feet covered).
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Roller Brand
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a. Construct the ANOVA table. [Hint: The compu- tations can be expedited by subtracting 400 (or any other convenient number) from each obser- vation. This does not affect the nal results.]
b. State and test hypotheses appropriate for deciding whether paint brand has any effect on coverage. Use a = .05.
c. Repeat part (b) for brand of roller.
d. Use Tukey s method to identify signi cant dif- ferences among brands. Is there one brand that seems clearly preferable to the others?
e. Check the normality and constant variance as- sumptions graphically.
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