Memorable Experience Chapter 5
Category: Business and Money
Asked by: douger-ga
List Price: $2.00
02 Jul 2003 20:06 PDT
Expires: 01 Aug 2003 20:06 PDT
Question ID: 224563
If a frequency distribution of a population conforms to the so-called normal distribution, then, what percentage of measurments in the population fall within two standard deviations of the population mean?
Re: Memorable Experience Chapter 5
Answered By: playhosea-ga on 02 Jul 2003 21:12 PDT
Hi douger-ga, Assuming a normal distribution, 95% of the measurements will fall within tow standard deviations of the population mean. The "68-95-99.7" rule (also called "empirical" rule) answers your question quite clearly. 68% of the measurements will fall within one standard deviation, 95% of the measurements will fall within two standard deviations and 99.7% of the measurements will fall within three standard deviations. Here are some sites where you can read more about this rule: http://www.oswego.edu/~srp/stats/6895997.htm http://www.socsci.mcmaster.ca/magee/2j3/pages/app2.html http://www.wayworld.com/samples/SPC/spc_05.htm Hope this helps! playhosea-ga
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