# Prob and Stats

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**Statistics help!** on
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Einstein claims that his true average quiz score is 90. You have sample data on 25 of his quizzes. The average for that samaple is 83, and the standard deviation for the sample (s) is 4. The alpha for this two-tailed test is 0.05. Provide the calculated t-vaule, the critial t-value, and corresponding confidence interval around the sample average