What is a histogram?

In statistics, the histogram is a graph type that shows the distribution of data frequencies, usually in the form of vertical stripes. This type of graph is also commonly called a frequency histogram and sometimes a column chart or a column chart. In the histogram graph, the height of each rod shows the number of items that fall within this range in the graph. Histogram distribution charts are often considered the most important tool in studying data distribution.

Histogram graph is generally depicted with the values ​​of values ​​on vertical Y Graph axes and various types or data categories along the horizontal x axis x. In addition, how often there is a certain value in a set of data, some other information can be obtained using statistical analysis of histogram data. This includes "shape" of data, such as "flat" distribution or "bell" distribution.

Pareto Graph is a special type of histogram, anyone is ordered by size, with the highest molding displayed on the left side of the graph and the smallest right. These Pareto graphs are often used in PR PROJECTS Quality control to highlight the most common product defects in production systems. They get their name from the "Pareto principle", which states that 20% of the inputs into the production process will cause 80% of defects.

Some examples of formulas that can be detected in histograms include patterns of a single peak and dual peak. The only peak in the data is also the statistical average for the data. If the statistical average is not in the center of the chart, this may mean a special reason that could be useful for exploring.

The pattern of dual peak occurs when there are two very high stripes on the graph. When this pattern is visible, this may indicate that there are two different sources of data. For example, in the service line, the peaks can be attributed to two individual operators.

Histogram alignment is a method used to handle image such as digital photo software. Uses histograms to elaborate, toThe levels of intensity levels in the figure are the most common and then distribute them more efficiently. In this way, the overall contrast of the image can be improved for better viewing.