Statistics for college

Central tendency describes how data values group around a center. The three common measures of central tendency are mean, median, and mode.

The mean is found by adding all the values and dividing by the total number of values.

The median is the middle value when the data are arranged in order.

The mode is the value that appears most often.

Class width is used when data are grouped into intervals. It shows the size of each class interval and is found by subtracting the lower limit of a class from the upper limit.

Understanding central tendency helps students summarize and interpret data, while class width helps organize data clearly and accurately.