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Find out mean deviation and its coeffici...

Find out mean deviation and its coefficient of the following data:

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The correct Answer is:
`MD_(barX)`=7.656, coefficient of `MD_(barX)`=0.38
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TARUN JAIN & VK OHRI-MEASURES OF DISPERSION-Learning by doing
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  18. Following are the marks obtained by 20 students in statistics. Find ou...

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  19. Calculate coefficient of variation of the following data:

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