Question

Difference between ogive and frequency polygon

Answer 1

Ogive and frequency polygon are the way of representing statistical data in different ways and different things.
A frequency polygon is way of representing data with the help of lines that connects the points of the frequencies with the midpoints of the classes.
In case of cartesian system the frequencies are second coordination while the midpoints of the classes are the first in vertics of polygon .
While ogive is the graph through which the cumulative frequencies for the classes with in the frequency distribution are represented . It shows the values of data below a specific boundary.

Answer 2

The main difference between an ogive and a frequency polygon is - An ogive is a plot of cumulative values while a frequency polygon is a plot of the values themselves.

An ogive is also called the cumulative frequency graph. It is a curve which shows the cumulative frequency of a given set of data. For un-grouped data the data is shown on the x-axis and the cumulative frequency is plotted on the y-axis.

To draw a frequency polygon first we have to choose a class interval like we do for histograms. Then we represent the values of the scores in the data on the x-axis. After that we put a tick mark in the middle of each class interval and label it. This is the middle value of the class.