ABSTRACT
The histogram is easily the most commonly used statistical method. It is used to detect frequency patterns in data.
A histogram is a way to count the number of data points in data intervals. First, the data range that extends from the minimum to maximum value is divided into a certain number of equal intervals. Then we count the number of data points in each interval and tabulate the counts in a table called tally. The frequency table is converted into a bar graph known as a histogram. An example of data creating a tally, constructing a histogram, and deriving a frequency diagram as well as an ogive from the histogram is illustrated in Appendix 10.1.
