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The difference(after-before) in the score on a cognitive function test before and after the drug Adderall...

The difference(after-before) in the score on a cognitive function test before and after the drug Adderall was given to 10 test subjects is 4, 5, 10, -5, -1, 12, 3, 15, -6, 9. Test the claim, at the 1% significance level, that Adderall improved test scores.
14. Find the 99% confidence interval for the difference in test scores in problem #14.
Math   Statistics-And-Probability   
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