In your local high school, a random sample of 10 high school seniors participated in a course to increase their knowledge of healthy living activities. The students were given a knowledge quiz before...

In your local high school, a random sample of 10 high school seniors participated in a course to increase their knowledge of healthy living activities. The students were given a knowledge quiz before and after the program. The scores are listed below.
Calculate a two-sided 95% confidence interval for the mean difference in the scores. Give an interpretation of the confidence interval.
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