Question: Calculate mean difference score for the following data: Time 1 Time 2 XD 61 83 22 75 89 14 91 98 -7 83 92 -9

Calculate mean difference score for the following data: Time 1 Time 2 XD 61 83 22 75 89 14 91 98 -7 83 92 -9 74 80 -6 82 88 -6 98 98 O 82 77 +5 69 88 -19 76 79 3 91 91 O BO -10\fWhich of the following is a research question that could be tested using an independent samples t-test? O None of the other answers. O Do older siblings do more housework than younger siblings? O Do those who take a test-prep class do better on the SAT than those who do not? Do college students report higher anxiety than the population in general

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