What is the mean deviation of a frequency distribution equal to?
- A$\frac{\Sigma d_i}{\Sigma f_i}$
- B$\frac{\Sigma |d_i|}{\Sigma f_i}$
- C$\frac{\Sigma f_i d_i}{\Sigma f_i}$
- D$\frac{\Sigma f_i |d_i|}{\Sigma f_i}$
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Similar Questions
What is the mean deviation about the mean for the observations $5, 10, 15, 20, \dots, 85$?
Difficult
View SolutionLet $\bar{X}$ and $M.D.$ be the mean and the mean deviation about $\bar{X}$ of $n$ observations $x_i,$ $i = 1, 2, \dots, n.$ If each of the observations is increased by $5,$ then the new mean and the mean deviation about the new mean,respectively,are
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View SolutionThe mean deviation about the median of the numbers $2, 3, 5, 20, 17, 15, 13, 11, 9, 7$ is
Find the mean deviation about the mean for the data $4, 7, 8, 9, 10, 12, 13, 17$.
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View SolutionIf $10$ is the mean of the data $2, 3, 5, 18, 17, 15, 13, x, 9, 7$,then the mean deviation of this data about its mean is
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