Mathematics, 23.10.2021 01:00 alyxkellar06

The standard deviation of the lifespan of a certain brand of LED light bulbs is 23 months. The quality control department at this company takes a random sample of 75 LED light bulbs and finds the mean lifespan of sample is 135 months. What is the probability that this sample mean is within 1 months of the mean of all light bulbs produced by the company

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The standard deviation of the lifespan of a certain brand of LED light bulbs is 23 months. The quali...

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