1.

What is the formula for the arithmetic mean?

A. ( frac {Number , of , the , observations}{Sum , of , observations} )
B. ( frac {Sum , of , the , observations}{Number , of , observations} )
C. ( frac {Product , of , the , observations}{Number , of , observations} )
D. ( frac {Sum , of , the , observations}{Product , of , the , observations} )
Answer» C. ( frac {Product , of , the , observations}{Number , of , observations} )


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