In an experiment testing the effects of caffeine on performance on a statistics exam, students were...
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In an experiment testing the effects of caffeine on performance on a statistics exam, students were given 0, 1, or 3 cups of coffee before the test. The dependent variable was how many questions students answered correctly (out of 10). The grand variance was 1.5 (see class notes for explanation of how knowing the grand variance averts drudgery in computation of ANOVA). The means and number of subjects per group are given below: Zero Cups of Coffee n=10 M=8 One Cup of Coffee n=10 M=9 Three Cups of Coffee n=10 M=8 16. Is there a significant effect, overall, of coffee consumption on performance on statistics exams? Be sure to (a) show calculations; (b) describe where you would expect you F value to fall if the null hypothesis is correct (using a = .05); (c) give your overall conclusion; (d) report effect size In an experiment testing the effects of caffeine on performance on a statistics exam, students were given 0, 1, or 3 cups of coffee before the test. The dependent variable was how many questions students answered correctly (out of 10). The grand variance was 1.5 (see class notes for explanation of how knowing the grand variance averts drudgery in computation of ANOVA). The means and number of subjects per group are given below: Zero Cups of Coffee n=10 M=8 One Cup of Coffee n=10 M=9 Three Cups of Coffee n=10 M=8 16. Is there a significant effect, overall, of coffee consumption on performance on statistics exams? Be sure to (a) show calculations; (b) describe where you would expect you F value to fall if the null hypothesis is correct (using a = .05); (c) give your overall conclusion; (d) report effect size
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Answer rating: 100% (QA)
a Calculations Grand Mean GM 89830 83 Between group variance BGV 10983210883210883230 04 Within group variance WGV 15 04 11 b If the null hypothesis i... View the full answer
Related Book For
Statistics Unlocking the Power of Data
ISBN: 978-1118583104
1st edition
Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock
Posted Date:
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