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?