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Mathematics, 05.05.2021 18:10 sindy35111

The weights of 12-year old boys are normally distributed with a mean of 89 lbs. If 68% of 12 year old boys are between the weights of 82.7 lbs and 95.3 lbs, what is the standard deviation? A
34
B
6.3
C
3.5
D
12.6

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