Quick Answer: What Are The Uses Of Frequency Polygon?

Is a frequency polygon a line graph?

A frequency polygon is a line graph..

What is ogive curve?

The word Ogive is a term used in architecture to describe curves or curved shapes. Ogives are graphs that are used to estimate how many numbers lie below or above a particular variable or value in data. To construct an Ogive, firstly, the cumulative frequency of the variables is calculated using a frequency table.

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.

How do you graph a frequency polygon?

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 frequency polygon with example?

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.

What should a frequency polygon look like?

A frequency polygon is very similar to a histogram. In fact, they are almost identical except that frequency polygons can be used to compare sets of data or to display a cumulative frequency distribution. In addition, histograms tend to be rectangles while a frequency polygon resembles a line graph.

What is a total frequency?

1. A frequency is the number of times a given datum occurs in a data set. According to the table above, there are three students who work 2 hours, five students who work 3 hours, etc. The total of the frequency column, 20, represents the total number of students included in the sample.

What do we use cumulative frequency for?

Cumulative frequency is used to determine the number of observations that lie above (or below) a particular value in a data set. … The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors.

What is more than cumulative frequency?

Number of observations less than the upper boundary of a class is called “less than type” cumulative frequency of that class. Number of observations more than or equal to lower boundary of a class is called “more than type” cumulative frequency of that class.

How many types of frequency curves are there?

Learn more about Frequency Polygon here. There are two types of Cumulative Frequency Curves (or Ogives) : More than type Cumulative Frequency Curve. Less than type Cumulative Frequency Curve.

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.

Why are frequency tables useful?

The frequency table records the number of observations falling in each interval. Frequency tables are useful for analyzing categorical data and for screening data for data entry errors. Note that we will refer to two types of categorical variables: Categorical and Grouping or Break.

What is the difference between cumulative frequency and frequency?

A relative frequency is the fraction or proportion of times an answer occurs. … Cumulative relative frequency is the accumulation of the previous relative frequencies. To find the cumulative relative frequencies, add all the previous relative frequencies to the relative frequency for the current row.

What is frequency curve?

A smooth curve which corresponds to the limiting case of a histogram computed for a frequency distribution of a continuous distribution as the number of data points becomes very large. SEE ALSO: Frequency Distribution, Frequency Polygon, Gaussian Function, Histogram.

What is frequency polygon class 11?

Frequency Polygons. A frequency polygon is almost identical to a histogram, which is used to compare sets of data or to display a cumulative frequency distribution. It uses a line graph to represent quantitative data. … Tables, graphs, pie-charts, bar graphs, histograms, polygons etc.