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For a frequency distribution standard de...

For a frequency distribution standard deviation is computed by applying the formula (a) `sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2)` (b) `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))` (c) `sigma=sqrt((sumfd^2)/(sumf)-(sumfd)/(sumf))` (d) `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))`

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For a frequency distribution standard deviation is computed by applying the formula (a) sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2) (b) sigma=sqrt(((sumfd^2)/(sumf))-(sumfd^2)/(sumf)) (c) sigma=sqrt((sumfd^2)/(sumf)-(sumfd)/(sumf)) (d) sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))

For a frequency distribution standard deviation is computed by applying the formula\ sigma=sqrt((sumfd^2)/(sumf)-((sumfd^)/(sumf))^2) (b) sigma=sqrt(((sumfd^2)/(sumf))-(sumfd^2^)/(sumf)) (c) sigma=sqrt((sumfd^2)/(sumf)-(sumfd^^)/(sumf)) (d) sqrt(((sumfd^)/(sumf))^2-(sumfd^2^)/(sumf))

For a frequency distribution mean deviation from mean in computed by: (a) MdotDdot = (sumf)/(sumf|d|) (b) MdotDdot=(sumd)/(sumf) (c) MdotDdot=(sumfd)/(sumf) (d) MdotDdot=(sumf|d|)/(sumf)

For a frequency distribution mean deviation from mean in computed by (a) MdotDdot=(sumf)/(sumf|d|) (b) MdotDdot=(sumd)/(sumf) (c) MdotDdot=(sumfd)/(sumf) (d) MdotDdot=(sumf|d|)/(sumf)

For a frequency distribution mean deviation from mean in computed by MdotDdot=(sumf)/(sumf|d|) (b) MdotDdot=(sumd)/(sumf) (c) MdotDdot=(sumfd)/(sumf) (d) MdotDdot=(sumf|d|)/(sumf)

Show that the two formulae for the standard deviation of ungrouped data: sigma=sqrt((1)/(n)sum(x_(i)-X)^(2))and sigma'=sqrt((1)/(n)sum xi2-X^(2)) are equivalent where X=(1)/(n)sum x_(i)

If the mean of a frequency distribution is 8.1 and sumf_i x_i=132+5k ,\ \ sumf_i=20 , then k= (a) 3 (b) 4 (c) 5 (d) 6

If the mean of a frequency distribution is 8.1 and sumf_i x_i=132+5k ,\ \ sumf_i=20 , then k= (a) 3 (b) 4 (c) 5 (d) 6

The mean of a discrete frequency distribution x_i//f_i ; i=1,\ 2,\ ddot,\ n is given by (a) (sumf_i x_i)/(sumf_i) (b) 1/n\ sum_(i=1)^nf_i x_i (c) (sumi=1nf_i x_i)/(sumi=1n x_i) (d) (sumi=1nf_i x_i)/(sumi=1n i)

The mean of a discrete frequency distribution x_i//f_i ; i=1,\ 2,\ ddot,\ n is given by (a) (sumf_i x_i)/(sumf_i) (b) 1/n\ sum_(i=1)^nf_i x_i (c) (sumi=1nf_i x_i)/(sumi=1n x_i) (d) (sumi=1nf_i x_i)/(sumi=1n i)