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Mathematics, 21.04.2020 14:56 irlShadow

7. The 400-meter race times recorded in the boys
track meet was normally distributed with a
standard deviation of 3 seconds. If David
finished the race in 51.2 seconds with a
--score of -2.6, what was the mean time?
PLEASE HELP!!

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7. The 400-meter race times recorded in the boys
track meet was normally distributed with a

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