The random error in the arithmetic mean of 100 observations is x; then random error in the arithmetic mean of 400 observations would be

(1) 4x

(2) 14x

(3) 2x

(4) 12x

Concept Videos :-

#3 | Error Analysis : Definitions, Mathematical Modeling
#4 | Error Analysis : Modeling of Errors & Propagation of Error
#5 | Error Analysis : Propagation of Error (Division) & Example

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