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Mathematics Question on Statistics

Consider the following statements : (1) Measures of dispersion Range,Quartile deviation, mean deviation, variance, standard deviation are measures of dispersion Range = Maximum value - minimum values (2) Mean deviation for ungrouped data M.D. (xˉ)=∑∣xi−xˉ∣n(\bar{x}) = \frac{\sum | x_i - \bar{x} |}{n} M.D. (M)=∑∣xi−M∣n(M) = \frac{\sum | x_i - M |}{n} (3) Mean deviation for grouped data M.D. (xˉ)=∑ fi∣xi−xˉ∣N(\bar{x}) = \frac{\sum \, f_i| x_i - \bar{x} |}{N} M.D. (M)=∑ fi∣xi−M∣N(M) = \frac{\sum \, f_i | x_i - M |}{N} where N=∑ fiN = \sum \, f_i which of the above statements are true?

A

Only (1)

B

Only (2)

C

Only (3)

D

All the abvoe

Answer

All the abvoe

Explanation

Solution

Answer (d) All the abvoe