Statistics Test...

The variance of six observations is given as $$16$$ and mean is $$8$$. If each observation is multiplied by $$3$$.
Find the new variance:

Find the variance of the following data:
$$5,9,8,12,6,10,6,8$$

Find the Coefficient of Variation of Factory $$A$$.

Find the Standard Deviation of the following data:
$$5,9,8,12,6,10,6,8$$

Variance remains unchanged by change of

Standard deviation is calculated from the Harmonic Mean (HM).

Find the Coefficient of Variation for Factory $$B$$:

The formula for the coefficient of range is $$\dfrac{\text{Range}}{a+b}$$. Here, $$a$$ and $$b$$ denote:

The variance of $$10, 10, 10, 10, 10$$, is