You utilize an independent-samples t-tests to analyze the difference between levels of happiness of college students. One group of students Is college freshmen (n = 20), and the other group consists of college seniors (n = 20). You find that the mean happiness level for the freshmen is m = 6, and the mean happiness for seniors Is m = 10. The pooled variance is 3.0, and the t-statistic Is 4.0. D Question 52 2 pt Using the info above: 51a. Calculate Cohen's d (2 points) D Question 53 2 pts 51 b Write what the Cohen's d calculated above tells you in a sentence in terms of the IV (hint: talk about the magnitude) he Edit View Insert Format Tools Table 12 pt v Paragraph ~ | B I U A v Z v Ty | Q v Q V Qv By| S O BV Ev = D B V V6 D Call 1 0 words > D Question 54 2 pts 51c. Calculate percentage of variance explained (r) O 73 F Pollute