Do It Yourself!: Student's t Probabilities

Use the slider to select the required degrees of freedom. Type a value of t in the text box and press the Enter key to calculate the two-tailed probability. If you enter the required two-tailed probability, the applet calculates the critical value of t.

This graph gives one-tailed values.

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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, Eleventh Edition, by Mendenhall, Beaver, & Beaver. (c) 2003, Duxbury Thomson Learning. The applet(s) on this page may not be copied, duplicated, or reproduced for any reason.