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(DU of people groups groups on Ill her hour mining whether five groups of children from different grades (2nd, 4 zade toward public support of private schools. Or you might be intere and 10th) differ in the level of parental participation in school activiti- ANOVA must be used in any analysis where chere is only one dimension or treatment, here are more than two levels of the grouping factor, and une is looking at mean differences across groups. mula for the computation of the F value, which is the test statistic the hypothesis that there are overall differences between groups, is 13.1. It is simple at this level, but it takes a bit more arithmetic to ne of the test statistics you have worked with in earlier chapters. between MS F= MS within Use this Exact F ratio formula. Do not use other formula.
The Effect Size for t for Two • To find the effect size, we use the same formula as we did for the t-test for independent means. X, - X ES = (11.6) S Where: • ES is the effect size, Use this . x, i to mean tor Group EXACT formula to find the effect size. X, is the mean for Group 2, and s is the standard deviation from either group, 12
Below you have the scores for two Studies (Study A and Study B). For each study decide whether you can reject the null hypothesis. Use the p <0.01. If you reject the null hypothesis, for each problem find the effect size and determine if the effect size is small, medium, or large (10 Points each) Please show your work for each step of the process for the F test. You MUST use the F ratio formulas from the textbook to receive credit. Using any other form of the formula will result in score of zero. You MUST also use the Effect Size formula from the textbook, otherwise no you will not receive any credit. Group 1 STUDY A Group 2 Group 6 4 0 4 8 7 5 3 9 7 5 IX M meani Σκη N=In ΣΣΑ (ΣΣΑΝ ΣΣίμη Σκη Σχνη STUDY B Group 1 Group 2 Group 3 12 10 8 4 2 0 12 10 8 4 2 0 IX Mimar ΣΧη N.In ΣΣΑ (LXXN ΣΣ(x3 Σ(Σκ) και η Don