Posted by **Mike** on Wednesday, September 30, 2009 at 9:38pm.

Suppose scores on an IQ test are normally distributed. If the test has a mean of 100 and a standard deviation of 10, what is the probability that a person who takes the test will score between 90 and 110?

- Math -
**Reiny**, Wednesday, September 30, 2009 at 9:48pm
wonderful program for your type of question.

Just enter the mean and sd ,then 90 and 110 for the 'between'

- oops - Math -
**Reiny**, Wednesday, September 30, 2009 at 9:49pm
forgot the link

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

- Math -
**Mike**, Wednesday, September 30, 2009 at 9:54pm
Cool, thanks!

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