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Suppose that we check for clarity in 50 locations in Lake Tahoe and discover that the...

Suppose that we check for clarity in 50 locations in Lake Tahoe and discover that the average depth of clarity of the lake is 14 feet. Suppose that we know that the standard deviation for the entire lake's depth is 2 feet. What is the confidence interval for clarity of the lake with a 99% confidence level?

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