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Mobius -> RE: High Velocity AP round hit-zones (9/10/2013 6:51:56 PM)
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quote:
ORIGINAL: Mobius
quote:
ORIGINAL: Yoozername
Edit:
quote:
mittlere Streuung
(average deviation)
Die mittlere Streuung wird bestimmt durch die Summe der Absolutbeträge
der Abweichungen der Stichprobenwerte vom Mittelwert, dividiert durch
den Stichprobenumfang n:
Translate.... mean scatter (Average deviation) The mean dispersion is determined by the sum of the absolute values of the deviations of the sample values from the mean, divided by the sample size.
Wouldn't they be the same as saying 50% are higher and 50% are lower?
It seems you were right at to the meaning.
It doesn't mean 50% deviation like I thought.
Mean Deviation= η
Standard Deviation= σ
Probable Error= γ =0.67449 σ
So σ = 1.25331 η
50% Zone ρ = (2γ) = 1.3489795 σ
Making the substitution you get:
50% Zone ρ = (2γ) = 1.3489795 * 1.25331η =1.69069 η
To translate mean deviation to 50% zone the MD (η) must be multiplied by 1.69.
Where the 122mm DDR document MD at 1000m shows the scatter is 0.3m x 0.3m this is equivalent to a 50% zone of 0.507m x 0.507m.
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