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8) A consumer organization wants to estimate the life of Extra-Strong light bulbs. With 35 randomly purchased bulbs, they find the mean life to be
8) A consumer organization wants to estimate the life of Extra-Strong light bulbs. With 35 randomly purchased bulbs, they find the mean life to be 998 hours, with standard deviation of 33 hours. Find the 95% confidence interval for the mean life of bulbs. Interpret your result.
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