For class interval and frequency of data is given {(1 - 3, 20) , (3 - 5, 25 ), (5 - 7, 15)}
lower limit of modal class is

The lower limit of class interval 20-25 is :

The mid-value of a class-interval of a frequency distribution is 10 and the class-length of each class is 6, The lower class limit of the class-interval is

Consider the data The frequency of the upper limit of the median class and the lower limit of the modal class is

For the following distribution the lower limits of the modal class is

From the following frequency table. Find : (a) The frequency of fifth class interval (b) The upper class limit of third class interval. (c) The lower class limit of second class interval. (d) The class mark of sixth class interval.

From the following frequency table. Find : (a) The frequency of fifth class interval (b) The upper class limit of third class interval. (c) The lower class limit of second class interval. (d) The class mark of sixth class interval.

A frequency polygon is constructed by plotting frequency of the class interval and the (a) upper limit of the class (b) lower limit of the class (c) mid value of the class (d) any values of the class

The mid-values of the class-intervals of a frequency distribution are respectively 15,20,25,30,…… The class interval of which the mid-value is 20 is