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4 years ago

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The life in hours of a 75-watt light bulb is known to be normally distributed with σ = 25 hours. Suppose that you wanted the tot

al width of the two-sided confidence interval on the mean life to be six hours at 95% confidence. What sample size should be used?

1 answer:

Temka [501]4 years ago

4 0

Answer:

Step-by-step explanation:

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