Using histogram, a frequency polygon is plotted as shown below. If the area of frequency polygon is 100 unit2 and class length are same for all the classes, what is the length of a class interval?
The frequency polygon of a frequency distribution is shown below.
Answer the following about the distribution from the histogram.
(i) What is the frequency of the class interval whose class mark is 15?
(ii) What is the class interval whose class mark is 45?
(iii) Construct a frequency table for the distribution.
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
To complete the frequency polygon plot we assume a class interval with frequency zero and then ________ .
In a frequency polygon plot why do we add extra class interval with frequency zero, one before and one after the given class intervals?