If one of the variable is missing from the data sereies:

1.	If one of the variable is missing from the data sereies:
Answer» We can CALCULATE arithmetic mean by IGNORING the missing item. We can calculate ARITMETIC mean by assuming some value of the missing item. We can ASSUME that the value of missing item is equal to the arithmetic mean of the remaining ITEMS. We cannot calculate arithmetic mean. Solution :D

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