Quartiles can be discovered by arranging a set of numbers from smallest to highest and then dividing the data into separate groups. Finding the quartiles of a data set is useful for discovering trends, such as the median... More »

To find the first quartile of a set of numbers, find the median of the lowest half of the data set. This median is the first, or lowest, quartile in the data set. To find the third, or upper, quartile of a data set, inst... More »

To make a box-and-whisker plot, mark the minimum, first quartile, median, third quartile and maximum of your data set above an evenly spaced number line, and draw boxes from the median to the first and third quartile and... More »

A stem and leaf plot with decimals is an organized representation of the frequency with which certain numbers containing decimals occur in a set of data. Stem and leaf plots can be applied in a number of different fields... More »

A bar graph is a way to visually represent a set of data. Bar graphs are particularly useful for data that is easy to categorize. The category is traditionally placed on the x-axis, and the values are put on the y-axis. More »

The box-and-whisker plot is a technique in statistics that graphically shows the distribution of a set of data involving the minimum and maximum values, as well as the first, second and third quartiles. The plot is typic... More »

To make a stem and leaf plot, organize the data in a list with the same first numbers together. Then write the stem numbers on one side of the chart and the leaf numbers out to the side by the appropriate stem numbers. More »