MyApplet: Normal Probabilities and z-Scores

Change the values in any cell to compute and to display other probabilities as areas under the normal curve. Be sure to press the Enter key after editing in a cell to record the changes. [Note: when this page loads, the values correspond to Example 6.9 in the text.]

This applet can also be easily used to do Example 6.10.

  1. Use the menu at the bottom of the graph to change from "One-Tailed" to "Cumulative."
  2. Enter .95 in the probability text box and press Enter.

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The applet(s) on this page is from Seeing Statistics,™ an online, interactive statistics textbook. Seeing Statistics is a registered service mark used herein under license. The applet(s) on this page was designed to be used exclusively with Introduction to Probability and Statistics, Twelfth Edition, by Mendenhall, Beaver, & Beaver. (c) 2005, Brooks/Cole Thomson. The applet(s) on this page may not be copied, duplicated, or reproduced for any reason.