If the mean of a and 1/x is M, then mean of x² and 1/x² is

The range of the data 7, 13 , 6 , 25 , 18 , 20 , 16 is

In a __________,the numerical  data is represented by the sectors of a circle.

In the class interval 35 - 46 ; the lower limit is

The difference between the maximum and minimum values of a variable is called its

The class mark of the class 4 - 9 is

What is the size of class interval 0-10?

A quantity which is being measured in an experiment is called a

__________ gives the number of times that a particular entry occurs.