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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Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.
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Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?
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An electrical firm manufactures light bulbs that have a length of life that is approximately normall...
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