The mean of $100$ observations is $50$ and their standard deviation is $5$. Then,the sum of squares of all observations is

If the sum of squares of deviations of $10$ observations from their mean $50$ is $250$,what is the coefficient of variation?

The variance of the variates $112, 116, 120, 125, 132$ about their $A.M.$ is

For a given distribution of marks,the mean is $35.16$ and its standard deviation is $19.76$. The coefficient of variation is:

Let $a, b, c, d$ and $e$ be the observations with mean $m$ and standard deviation $S$. The standard deviation of the observations $a+k, b+k, c+k, d+k$ and $e+k$ is

The following is the record of goals scored by team $A$ in a football session:

No. of goals scored	$0, 1, 2, 3, 4$
No. of matches	$1, 9, 7, 5, 3$

For team $B$,the mean number of goals scored per match was $2$ with a standard deviation of $1.25$ goals. Find which team may be considered more consistent?