s. effect size and ANOVA AaAa Amit Almor, a psychology researcher at the univers
ID: 3289849 • Letter: S
Question
s. effect size and ANOVA AaAa Amit Almor, a psychology researcher at the university of South arolna, conducted a series of experiments on conversation and attention level. He found that subjects were four times more distracted while prepering to speak or speaking than when they were listening. This research has many implications, induding those for the issue of using cell phones while driving. You deaide to explore this issue by having three different groups try tracking a fast-moving target on a computer screen. The first group is preparing to speak, the second group is speaking, and the third group is listening to a conversation. The sample mean and sum of squares of the scores for each of the three groups are presented in the following table. Sample Mean Sum of Squares Group Preparing to speak Speaking Listening 98.3 101.5 103.2 7,2810.0900 6,6156.8100 70,277.7600 After collecting the data, you analyze the data using an ANOVA. The results of your analysis are presented in the following ANOVA table. ANOVA Table Source of Variation Between Treatments Within Treatments Total MS 1,547.50 280.11 df 5.52 209,244.66 212,339.66 747 749 These findings are significant at ·01, which tells you that the difference is very unlikely to have ooored just by chance, but it does not tell you the size of the effect.simple measure of the effect size is given by what is the formula for this measure of the effect sizer O SSbetween/SSthin (Round your answer to two decimal places) Based on the data given, the effect size is ntes for by the effet due to treatments s The percentage of variablity in the scores accounted for by the effect due to treatments isExplanation / Answer
1.D is the right option.
Effect size = N2 = SSbetween/SStotal
2. Based on the data given, the effect size is 3095/209244.66 = .0148
3. The percentage of variablity in the scores accounted for by the effect size due to treatmets is 1.48% ( This is also callled the R sqaure )
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