Mathematics, 05.07.2019 20:30 rilee3344

Your company manufactures hot water heaters. the life spans of your product are known to be normally distributed with a mean of 13 years and a standard deviation of 1.5 years. what is the probability that the mean life span in a group of 10 randomly selected hot water heaters is between 12 and 15 years? (round to the nearest ten-thousandth.)

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