We test whether “cramming” for an exam is harmful to grades. Condition 1 crams for a pretend exam, but condition 2 does not. Each group has 31 participants. Below are the data: M1=43, SS1=1920, M2=48, SS2=2508 Please to calculate r2

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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We test whether “cramming” for an exam is harmful to grades. Condition 1 crams for a pretend exam, but condition 2 does not. Each group has 31 participants.

Below are the data:

M1=43, SS1=1920, M2=48, SS2=2508

Please to calculate r

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