ND measures the number of outlets per total number of outlets from the specific market, while WD measures how much the outlet sells of the total volume.
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Numeric data are numbers (like age, cost, etc.), while non-numeric data are not numbers (like name, address, etc.).
Numeric array has numbers(+integers) that represent the values Associative array has strings that represent the values
There is. Arithmetic mean is simple average of numbers not weighted by anything. However in EV, the numbers are weighted by their probability
None. The full name is the Probability Distribution Function (pdf).
They are the same. The full name is the Probability Distribution Function (pdf).