If X- is the mean of a set of N observations- then- X - X 2- N -A- Standard deviationB- Root mean square deviationC- Mean DeviationD- Variance

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Variance and Standard Deviation

If X̅ is the ...

Question

If $¯ X$ is the mean of a set of N observations, then

$\frac{\sum (X - ¯ X)^{2}}{N} = ?$

Standard deviation

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Mean Deviation

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Root mean square deviation

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Variance

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Solution

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Similar questions

¯ ¯ ¯ X

\frac{\sum (X - ¯ ¯ ¯ X)^{2}}{N}

If $μ$ is the mean of a distribution, then $\sum f_{i} (y_{i} - μ)$ is equal to

x_{1}, x_{2}, . . . . ., x_{n}

¯ x

x_{i} + 2; i = 1, 2, . . ., n

¯ x + 2

2,

2

x_{1}, x_{2}, x_{3}, . . . ., x_{n}

¯ x

x_{i} + 3 i \forall i = 1, 2, 3, . . . . n

I f t h e m e a n o f t h e s e t o f n u m b e r x_{1}, x_{2} . . . x_{n} i s ¯ x, t h e n t h e m e a n o f t h e n u m b e r x_{i} + 2 i, 1 \leq i \leq n i s :

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