The random error in the arithmetic mean of 100 observations is x; then random error in the arithmetic mean of 400 observations would be
A) 4x
B) 1/4x
C) 2x
D) 1/2x
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A
Probably!!
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AmyX333:
The ans. is B. ...but don't know how!!
oh!!! Sry
Answered by
2
the random arithmetic of 400 observation=4X
that is =4*100=400
that is =4*100=400
the ans is B.....but how???
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