What is a frequency polygon BBC Bitesize?
A frequency diagram, often called a line chart or a frequency polygon, shows the frequencies for different groups. To plot a frequency polygon of grouped data, plot the frequency at the midpoint of each group.
What is frequency polygon with histogram?
A frequency polygon is a line graph of class frequency plotted against class mid-point. It can be obtained by connecting the mid-points of the tops of the rectangles in the histogram or drawn as a line graph.
What is the difference between a histogram and a frequency polygon?
Difference between frequency polygon and histogram: Frequency polygon is an improvement over histogram because it provides a continuous curve indicating the causes of rise and fall in the data. On the other hand, frequency polygon is an approximate curve, but still it is more usefui as compared to histogram.
What do you mean by histogram?
A histogram is a graphical representation that organizes a group of data points into user-specified ranges. Similar in appearance to a bar graph, the histogram condenses a data series into an easily interpreted visual by taking many data points and grouping them into logical ranges or bins.
What is frequency polygon with example?
Another type of graph that can be drawn to represent the same set of data as a histogram represents is a 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.
What is a histogram and how is it constructed?
A histogram is an approximate representation of the distribution of numerical data. To construct a histogram, the first step is to “bin” (or “bucket”) the range of values—that is, divide the entire range of values into a series of intervals—and then count how many values fall into each interval.
What are the similarities between histogram and frequency polygon?
Two histograms on the same graph tend to shroud each other and make comparison more difficult, but two frequency polygons can be graphed together with much less interference….Constructing a Relative Frequency Polygon.
| Interval | Frequency | |
|---|---|---|
| 69.5 | 79.5 | 107 |
| 79.5 | 89.5 | 147 |
| 89.5 | 99.5 | 130 |
| 99.5 | 109.5 | 78 |
How do you make a frequency polygon with a histogram?
To create a frequency polygon, start just as for histograms, by choosing a class interval. Then draw an X-axis representing the values of the scores in your data. Mark the middle of each class interval with a tick mark, and label it with the middle value represented by the class.
What is frequency polygon class 11?
A frequency polygon is a graphical form of representation of data. It is used to depict the shape of the data and to depict trends. It is usually drawn with the help of a histogram but can be drawn without it as well.