Histogram chart
Histogram chart:
Histograms are charts that show the frequency distribution of numerical data using rectangles, each of which represents intervals.
They represent the probability distribution of a continuous variable.
The range of values of the continuous variable is divided into a set of intervals on the horizontal axis (X).
The size of each bar shows the frequency of that bar among the intervals.
These distances are consecutive, adjacent (there is no gap between the bars) and have equal sizes.
The horizontal axis in the histogram shows the dimensions arranged by equal intervals and can show service center hours, prices, odometer readings, or other variables.
The vertical axis (Y’s) shows the quality, abundance or other indicators that are plotted for the intervals.
This value can be the number of properties, visitors, vehicles, calls and so on.
Therefore, the histogram chart after drawing can show the amount of sales revenue per hour, the number of vehicles repaired per hour on working days, the number of phone calls per half hour of each work shift, the odometer reading of cars repaired in the garage. and shows like them.
To draw a histogram, follow these steps:
Calculate the range of values (maximum and minimum).
Divide the domain into equal and uniform distances.
Calculate the number of observations in each interval.
It created bars whose height indicates the number of each distance.
The vertical axis shows the number of items related to each floor.
At first glance, histograms look similar to bar charts, and the audience or chart producers may confuse the two.
Histograms are used for continuous data, where the horizontal axis shows the intervals and ranges of the data, and the bars are placed next to each other.
where the horizontal axis shows the distances and ranges of the data, and the bars draw the discrete variables (classification of data points) and the distances or gaps between the bars distinguish each variable from the other variables make
A histogram is used to evaluate the distribution of data and helps to determine how the data points are distributed.
By doing this, the information contained in it is more than a picture of data points, which is shown as a stream of data.
This topic can be very useful for auditors because it is very helpful to understand the dynamics affecting the processes under review.
Histograms depict the flow of transactions during that period, instead of just focusing on the total number of transactions during a certain period of time.