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.
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, but 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.
What are the features 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.
What is one of the advantages of frequency polygons over histograms?
The frequency polygon is simpler than its histogram counterpart. It sketches an outline of the data pattern more clearly. The polygon becomes increasingly smooth and curve-like as we increase the number of classes and the number of observations.
What are the uses of frequency distribution?
As a statistical tool, a frequency distribution provides a visual representation of the distribution of observations within a particular test. Analysts often use a frequency distribution to visualize or illustrate the data collected in a sample.
What is a frequency polygon?
A frequency polygon is a line graph of class frequency plotted against class midpoint. It can be obtained by joining the midpoints of the tops of the rectangles in the histogram (cf. Fig. 3.3.).
What are merits and demerits of frequency polygon?
The Frequency polygons give an understanding of the shape of the data and the trends that a particular data set follows. It is usually drawn using a histogram, but it can also be drawn without it. The advantage of a frequency polygon is that two sets of related data can be easily compared on the same chart.
Which is better histogram or frequency polygon?
1. 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.
Is a frequency polygon qualitative or quantitative?
Frequency polygons are used to represent quantitative data when the data intervals do not equal the number of distinct values in the data set. This is always the case for continuous data.
What is the difference between histogram and frequency polygon?
1. 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. 2.
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.
What is the purpose of frequency in research?
[1] It allows the researcher to have a glance at the entire data conveniently. It shows whether the observations are high or low and also whether they are concentrated in one area or spread out across the entire scale.
What is the use of frequency in interpreting data?
A frequency or relative frequency table is used to summarize categorical, nominal, and ordinal data. It is also be used to summarize continuous data when the data set has been divided into meaningful groups. Count the number of observations that fall into each category.
