The standard error of sample mean is : (a) fracσ√(n) (b) fracσ√(2n) (c) fracσ²√(n) (d) (σ)/(n)

Question 21 of 39

Q. The standard error of sample mean is :

(a)

\frac{\sigma}{\sqrt{n}}

(b)

\frac{\sigma}{\sqrt{2n}}

(c)

\frac{\sigma^2}{\sqrt{n}}

(d)

\frac{\sigma}{n}

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$S.E.(\bar{x}) = \dfrac{\sigma}{\sqrt{n}}$ .

If a population has standard deviation $\sigma$ and samples of size $n$ are drawn, the sample means $\bar{x}$ vary around the population mean. Their standard deviation — the standard error of the mean — is

$S.E.(\bar{x}) = \frac{\sigma}{\sqrt{n}}.$

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Q.The standard error of sample mean is :

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Q.The standard error of sample mean is :

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