Measures of Dis...

The mean of a finite set X of numbers is $14$, the median of this set of numbers is $12$, and the standard deviation is $1.8$. A new set Y is formed by multiplying each member of the set S by $3$. Determine the correct statements w.r.t. set Y:
I. The mean of the numbers is set Y is $42$
II. The median of the numbers in set Y is $36$
III. The standard deviation of the numbers is set Y is $5.4$

Find the mean for the following data using step deviation method.

Which of the following can be used as measures of dispersions?

Find the coefficient of variation.

The mean of a distribution is $14$ and standard deviation is $5$. What is the value of the coefficient of variation?

Find the mean for the following data using step deviation method.

A random variable $X$ has the probability distribution given below. Its variance is 

If the standard deviation of a set of scores is $1.2$ and their mean is $10$, then the coefficient of variation of the scores is

Standard Deviation of n observations $a_1, a_2, a_3 .....a_n$ is $\sigma$ Then the standard deviation of the observations $\lambda a_1, \lambda a_2, ..., \lambda a_n$ is

Which one of the following is a measure of dispersion?