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Water Temperature If the variance of the water temperature in a lake is 310, how many days should the researcher select to measure the temperature

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Water Temperature If the variance of the water temperature in a lake is 310, how many days should the researcher select to measure the temperature to estimate the true mean within 50 with 95% confidence? Round the intermediate calculations to two decimal places and round up your final answer to the next whole number. The researcher needs a sample of at least days. olo Po

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