The variance of the ungrouped data $2, 12, 3, 11, 5, 10, 6, 7$ is

The coefficient of variation and standard deviation of an ungrouped data are $60$ and $21$ respectively. If $15$ is added to every observation of the data,then the coefficient of variation of the new data is

The variance of the discrete data $3, 4, 5, 6, 7, 8, 10, 13$ is

The coefficient of variation of the following distribution is

Class interval	$0-5$	$5-10$	$10-15$	$15-20$	$20-25$
Frequency	$4$	$1$	$10$	$3$	$2$

The following table shows the information about marks obtained in Physics,Chemistry,Mathematics,and Biology by $100$ students in a class. Which subject shows the highest variability in marks?

	Physics	Chemistry	Mathematics	Biology
Mean	$20$	$25$	$23$	$27$
$S$.$D$.	$3$	$2$	$4$	$5$

The coefficient of variation for the following data is

Class interval	$0-2$	$2-4$	$4-6$	$6-8$	$8-10$
Frequency	$2$	$3$	$5$	$3$	$2$