mabey some people dont know but possibly yes idk im 9 XD
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There is. Arithmetic mean is simple average of numbers not weighted by anything. However in EV, the numbers are weighted by their probability
"Relation" means: logical or natural association between two or more things.
A weighted mean is when some values contribute more than others. In order to calculate weighted mean multiply each weight by its value, add those and then divide by the sum of the weights.
Standard deviation is the variance from the mean of the data.
This is a Zoom lens with a focal length of between 75 and 300 mm.