Bursting Pressure (in lbs) : | 5-9 | 9-13 | 13-17 | 17-21 | 21-25 | 25-29 | 29-33 |

No. of bags : | 2 | 4 | 9 | 12 | 6 | 4 | 3 |

Calculate : (i) the standard deviation and (ii) the coefficient of variation.

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