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A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course. The results are
A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course. The results are given below. Construct a95% confidence interval for the mean difference between the before and after scores.
Before74837588846393849177
After73777077746795838475
A. 0.2 B. 1.0 C. 1.2 D. 0.8
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