Quartile deviation for a frequency distribution is

Find the semi-interquartile range and coefficient of quartile deviation of the frequency distribution of literacy rates in States/UT in India during 2001.

Find the mean , variance and standard deviation for the frequency distribution.

What is the algebraic sum of deviations of a frequency distribution about its mean?

What is the algebraic sum of deviations of a frequency distribution about its mean?

For a frequency distribution, lower quartile is :

Quartiles of a frequency distribution obtained from

Find out the Quartile deviation of a symmetrical distribution having Q_1 = 20 and Q_2 = 40

Find out quartile deviation from the following distribution .

Given the following data find the standard deviation of the given frequency distribution.