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Old 14th Apr 2011, 08:10
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peeush
 
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CEP assessment

This is the CEP related doubt that I have.

Going by the definition of CEP i.e. if CEP is n meters, 50% of rounds land within n meters of the target, 43% between n and 2n, and 7 % between 2n and 3n meters, and the proportion of rounds that land farther than three times the CEP from the target is less than 0.2%.

Now to say for example, if the min and max error in a measurement is 0% and 2% respectively, then value of 3n=2% (ignoring the area for 0.2% of the rounds discussed above).
If that be so then n=0.67%, and hence it may be correct to say that in 50% of the measurements made there is a likelihood of 0.67% error, for 93% of the measurements made (within '2n' metres: i.e. including the n and the 2n areas ;50%+43%) there is a likelihood of 1.34% error (2n value) and for 100% of the measurements a probability of 2% error (within 3n area) exists.

Well this is where I could reach given my very basic understanding in mathematics. Would request the august audience to guide me for corrections.

Thanks
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