Question

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'. For the following questions, please refer to the SPS wing questions, please refer to the SPSS output file below. Use a .05 a. On average, how much would we expect one group to differ from ano we expect one group to differ from another by chance? (1 point) the assumption of homogeneity of variances satisfied? How did you test the assumption? (2 points) c. Is there a significant difference between groups on the DV? Why? (2 point) d. What is the effect size? (1 point) Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means p-vatott t-test I Nenerala Dag Sig. sig. 2- talled) .020 Mean Difference 2.00000 Std. Error Difference .77380 DV 6.391 .0 2.585 Equal variances assumed Equal variances not assumed 2.585 .024 12.215 This is song 2.00000 .77380

Answer 1

SOLUTION A: The chance of concluding that there is difference in means between two groups is 5% or 0.05.

SOLUTION B:NO ASSUMPTION OF HOMOGENEITY OF VARIANCES NOT SATISFIED BECAUSE P VALUE=0.022 WHICH IS SMALLER THAN LEVEL OF SIGNIFICANCE THEREFORE WE CAN NOT ASSUME VARIANCES ARE EQUAL.

SOLUTION C] YES THERE IS SIGNIFICANCE DIFFERENCE BETWEEN GROUPS . THE P VALUE IS 0.024 WHICH IS SMALLER THAN THE LEVEL OF SIGNIFICANCE THEREFORE WE CAN CONCLUDE THAT THERE IS DIFFERENCE IN MEANS.

SOLUTION D] EFFECT SIZE r^2= t^2/t^2+df= (2.585)^2/(2.585)^2+12.215

effect size r^2= 0.35