ANATOMY OF A PIE CHART Pie Charts are

ANATOMY OF A PIE CHART Pie Charts are used to present qualitative, categorical data. On occasion quantitative data that has been grouped into a few categories, may be displayed via a Pie Chart. Building a Pie Chart: 1) Draw a circle. 2) Determine category sizes: To accurately draw a pie chart, recall that a circle is measured in degrees. A complete circle contains 360 degrees. To determine the size of each “slice” in the pie chart, convert the percent to a decimal, and then multiple by 360. This will give you the number of degrees within the circle occupied by that “slice. ” Chart Title. Each “slice” of the pie chart represents a category of the variable. For example: • Converted to a decimal, 76. 6% =. 766. • Multiply. 766 by 360 to obtain 275. 76, or approximately 276 degrees. This category should occupy approximately 276 of the 360 degrees in the circle. • Repeat this process for the other slices. Labels, Counts, and Percentages help explain what is being presented in the pie chart. 3) Add a title and category labels. Addition of the frequency count and/or percentage represented by each slice further enhances the chart. Shading, colors or patterns are used to distinguish slices from one another. Of those who responded, 76. 6% had clerical jobs. Note that the sum of the percentages from all categories is equal to 100%. Before there was a Pie Chart, there probably was a frequency table of the data. Number of observations.