Mathematics, 02.12.2019 18:31, shenzhen10

An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with a standard deviation of 45 hours. if a sample of 35 bulbs has an average life of 710 hours, find a 96% confidence interval for the population mean of all bulbs produced by this firm.

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An electrical firm manufactures light bulbs that have a length of life that is approximately normall...