SOLUTION: One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the σ=10. Find a 99% confidence interval for the mea

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Question 730062: One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the σ=10. Find a 99% confidence interval for the mean anger score of the population.
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