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Standard error of mean computed by

A. $$\frac{{{\text{Standard deviation of the sample}}}}{{\sqrt {{\text{Sample size}}} }}$$

B. $$\frac{{{\text{Sample}}}}{{\sqrt {N - 1} }}$$

C. $$\frac{N}{{\sqrt {\sigma - 1} }}$$

D. $$\frac{{N - 1}}{{\sqrt N }}$$

Answer: Option A


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