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I ran some test about something truly exciting and found that for Group A, the sample...

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Basic Math

I ran some test about something truly exciting and found thatfor Group A, the sample meanis 8.5, the standard deviationis 0.6,for n = 12. For Group B, the sample meanis 7.7, the standarddeviationis 0.8, and n = 15. Use these values (which you will needto manipulate to suit your needs!) for #1-3. Yes, this is all theinfo you need!

1. Calculate the effect size using Cohen’s d.

2. Calculate the amount of variance accounted for usingr2.

3. Construct a 95% confidence interval to estimate the truedifference between the groups. Is there one?

Answer & Explanation Solved by verified expert
4.3 Ratings (883 Votes)
M185M277SD106SD208n112n215aCohens d M2 M1 SDpooledSDpooled SD12 SD22 2SDpooled 062 082 2 0707107Cohens d 77    See Answer
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