22. Problem 22 in Chapter 10 presented data showing that mature soccer players, who have a history of hitting soccer balls with their heads, had significantly lower cognitive scores than mature swimmers, who do not suffer repeated blows to the head. The independent-measures t test produced t = 2.11 with df = 11 and a value of r2 = 0.288 (28.8%).
a. Convert the data from this problem into a form suitable for the point-biserial correlation (use 1 for the swimmers and 0 for the soccer players), and then compute the correlation.
b. Square the value of the point-biserial correlation to verify that you obtain the same r2 value that was computed in Chapter 10.
Please show work, not just anwers
The solution gives detailed steps on calculating Pearson Correlation using excel. All formula and calculations are shown and explained.