Quick Answer: What Is Frequency Polygon With Example?

What is the use of frequency polygon?

Frequency Polygons.

Frequency polygons are a graphical device for understanding the shapes of distributions.

They serve the same purpose as histograms, but are especially helpful for comparing sets of data.

Frequency polygons are also a good choice for displaying cumulative frequency distributions..

What are the advantages of frequency polygon?

1. The frequency polygons not only help to make sure that the data is sorted out and represented, they are also going to make it easier for the people to compare and contrast all the results. 2. These are much easier to understand and they give a clear picture of the distribution of data.

Is a frequency polygon a line graph?

A frequency polygon is a line graph.

What is a percentage polygon?

It is a variation of the frequency polygons. … It helps to determine the shape of the distributions. They are similar to histograms, but they are more useful to compare different sets of data. It is a line graph that is drawn by joining all the percentages of the frequency of the data points.

Why is a frequency distribution useful?

Frequency distributions are particularly useful for normal distributions, which show the observations of probabilities divided among standard deviations. In finance, traders use frequency distributions to take note of price action and identify trends.

What is a frequency polygon in Excel?

A frequency polygon is a visual representation of a distribution. … The frequency polygon is a curve that is drawn on the x-axis and the y-axis. The x-axis represents the values in the dataset while the y-axis shows the number of occurrences of each distinct category.

What is class size in statistics class 9?

To present such a large amount of data so that a reader can make sense of it easily, we condense it into groups like 0-9, 10-19,20-29, 30-39, . . ., 90-99. These groupings are called ‘classes’ or ‘class-intervals’, and their size is called the class-size or class width, which is 10 in this case.

What is the difference between ogive and frequency polygon?

The most important difference between them is that an ogive is a plot of cumulative values, whereas a frequency polygon is a plot of the values themselves. So, to get from a frequency polygon to an ogive, we would add up the counts as we move from left to right in the graph.

Who invented polygons?

Thomas BradwardineThe first known systematic study of non-convex polygons in general was made by Thomas Bradwardine in the 14th century. In 1952, Geoffrey Colin Shephard generalized the idea of polygons to the complex plane, where each real dimension is accompanied by an imaginary one, to create complex polygons.

What is ogive curve?

An Ogive Chart is a curve of the cumulative frequency distribution or cumulative relative frequency distribution. For drawing such a curve, the frequencies must be expressed as a percentage of the total frequency. Then, such percentages are cumulated and plotted, as in the case of an Ogive.

How do you draw a frequency polygon for grouped data?

Steps to Draw a Frequency PolygonMark all the class marks on the horizontal axis. It is also known as the mid-value of every class.Corresponding to each class mark, plot the frequency as given to you. … Join all the plotted points using a line segment. … This resulting curve is called the frequency polygon.

What is the difference between histogram and frequency polygon?

A frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. A histogram is a graph that illustrates the relative frequency or probability density of a single variable.

What are the characteristics of frequency polygon?

A frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. The heights of the points represent the frequencies. A frequency polygon can be created from the histogram or by calculating the midpoints of the bins from the frequency distribution table.

How do u find the frequency?

Frequency of a wave is given by the equations:f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters. … f=cλ

What do you mean by frequency polygon?

A frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. … The heights of the points represent the frequencies. A frequency polygon can be created from the histogram or by calculating the midpoints of the bins from the frequency distribution table.