1.

A data consists of n observations: x1,x2,....,xn. If n∑i=1(xi+1)2=9n and n∑i=1(xi−1)2=5n, then the standard deviation of this data is :

Answer»

A data consists of n observations:

x1,x2,....,xn. If ni=1(xi+1)2=9n and ni=1(xi1)2=5n, then the standard deviation of this data is :



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