Posted by **CJ** on Wednesday, April 28, 2010 at 8:39am.

The mean IQ among members of a club is 118 with a standard deviation of 9.46. What percentage of the members had IQ scores of 115 or higher?

- Statistics -
**Reiny**, Wednesday, April 28, 2010 at 8:43am
try this applet instead of looking up your z-scores in a table or chart, you will love it

You can enter the z-scores , or the data as it stands

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

- Statistics -
**CJ**, Wednesday, April 28, 2010 at 2:13pm
The applet is great! But I wonder, given the information I have, can I assume that the distribution is normal? (The mean IQ among members of a club is 118 with a standard deviation of 9.46. What percentage of the members had IQ scores of 115 or higher?) If it isn't normal - I can't determine the percentage ... or can I?

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