Q. The random error in the arithmetic mean of 100 observations is $x;$ then random error in the arithmetic mean of 4000 observations would be
A) 4$x$
B) $\frac{1}{4}x$
C) 2$x$
D) $\frac{1}{2}x$
Explanation
The correct answer is Option B: $\frac{1}{4}x$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.