Difference between histogram and simple bar diagram?
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Difference between histogram and simple bar diagram?
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Definition of Histogram
In statistics, Histogram is defined as a type of bar chart that is used to represent statistical information by way of bars to show the frequency distribution of continuous data. It indicates the number of observations which lie in-between the range of values, known as class or bin.
The first step, in the construction of histogram, is to take the observations and split them into logical series of intervals called bins. X-axis indicates, independent variables i.e. classes while the y-axis represents dependent variables i.e. occurrences. Rectangle blocks i.e. bars are depicted on the x-axis, whose area depends on the classes.
Definition of Bar graph
A bar graph is a chart that graphically represents the comparison between categories of data. It displays grouped data by way of parallel rectangular bars of equal width but varying the length. Each rectangular block indicates specific category and the length of the bars depends on the values they hold. The bars in a bar graph are presented in such a way that they do not touch each other, to indicate elements as separate entities.
Bar diagram can be horizontal or vertical, where a horizontal bar graph is used to display data varying over space whereas the vertical bar graph represents time series data. It contains two axis, where one axis represents the categories and the other axis shows the discrete values of the data.
Histogram refers to a graphical representation; that displays data by way of bars to show the frequency of numerical data. A bar graph is a pictorial representation of data that uses bars to compare different categories of data.
A histogram represents the frequency distribution of continuous variables. Conversely, a bar graph is a diagrammatic comparison of discrete variables.
Histogram presents numerical data whereas bar graph shows categorical data.
The histogram is drawn in such a way that there is no gap between the bars. On the other hand, there is proper spacing between bars in a bar graph that indicates discontinuity.
Items of the histogram are numbers, which are categorised together, to represent ranges of data. As opposed to the bar graph, items are considered as individual entities.
In the case of a bar graph, it is quite common to rearrange the blocks, from highest to lowest. But with histogram, this cannot be done, as they are shown in the sequences of classes.
The width of rectangular blocks in a histogram may or may not be same while the width of the bars in a bar graph is always same.
Difference between histogram and simple bar diagram are as follows: