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The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday.
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soludon: 0 Given data class f Md value 7 x? fi 0-4 2 32 64 4-8 12 6 72 432 8-12 90 900 12-16 14 140 2960 16-20 18 20-24 3 22@ 19 32,8163 S, 7286 ~ 5.7 li standard deviation : 57 5.7 opton B is Correct

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