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January 27, 2015

January 27, 2015

Posted by **henrietta** on Saturday, February 19, 2011 at 7:47am.

- statistics -
**Reiny**, Saturday, February 19, 2011 at 10:37amI find this webtool perfect for your kind of question

http://davidmlane.com/hyperstat/z_table.html

use the 2nd applet,

enter 80 in the mean

enter 12 in the sd

and .99 in the "shaded area" box

click on "below"

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