Homework Help: statistics

Posted by Kasi on Sunday, August 1, 2010 at 9:10pm.

Test scores on the
ACT exam are normally distributed with a mean of 211 and deviation of 4.8.

Using the 68-95-99.7 rule, find the percentage of ACT scores within 9.6 of the mean of 21.1, and 14.4 of the mean of 21.1

statistics - PsyDAG, Monday, August 2, 2010 at 11:20am
Mean ą 2 SD = 95%

Mean ą 3 SD = 99.7%

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