SAT, 01.12.2021 18:10 jahnoibenjamin
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with mean equal to 800 hours and a standard deviations of 40 hours. Find the probability that, a random sample of 16 bulbs will have an average life of i). Less that 775 hours. Ii) between 775 and 825 hours.
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An electrical firm manufactures light bulbs that have a length of life that is approximately normall...
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