ABSTRACT
A histogram is a standard way to visually display the frequency of the scores of a distribution. In a histogram, the scores on a variable are placed on the horizontal axis (x-axis), and the frequency of those scores are shown on the vertical axis (y-axis). The reading scores for the sample are on the x-axis, and the frequency of each score is on the y-axis. A histogram can be helpful in identifying outliers, scores that are very different than almost all other scores. The score of 5 is an outlier, as it is very different from where most students scored. The mode is the most frequently occurring score in a distribution. The mode is easy to identify in a histogram because it is the tallest bar. Histograms can only be constructed with interval and ratio level data.
