Question: When using the dependent-samples t-test (either the pretest-posttest version of the matched-samples version), what is N (as used in the calculation of degrees of freedom)?

When using the dependent-samples t-test (either the "pretest-posttest" version of the "matched-samples" version), what is N (as used in the calculation of degrees of freedom)? A) number of variables O B) total number of scores OC) number of pairs of scores OD) number of subjects

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