Fundamental Statistics for the Behavioral Sciences (4e)
by David C. Howell

Probabilities for the Normal Distribution

This applet may be used to find approximate answers for many of the exercises in Section 6.6, pp., 100-103. 		  Return to Normal Probability Page

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  How-To:

Drag or click (the closest edge will jump to the click location) on the graph to change the starting and ending values for the shaded area.

Change the Mean and StDev values as appropriate for your particular problem. For example, for Exercise 6.3 on p. 101, enter 195 for the Mean and 30 for the StDev. Remember to hit the Return key in the last box you enter to start the calculations and redrawing.

The accuracy is limited by the pixel resolution of the applet so these values are much less precise than those available with the more accurate normal probabilities applet.

    Return to Normal Probability Page

Return to Main Page of Seeing Statistics Examples

WARNING: The accuracy of this graph is severely limited by the resolution of the display. This graph should only be used for finding approximate normal probabilities suitable for educational purposes such as homework problems. It is not intended for and should not be used for any calculations which have any major consquences for health, safety, financial matters, etc.

The above applet is from the section "Working with the Normal Distribution" in Seeing Statistics by Gary McClelland. For more information, visit Seeing Statistics

© 1999, Duxbury Press