A simple random sample of 100 observations was taken from a large population. The sample mean & the standard deviation were determined to be 80 and 12 respectively. The standards error of mean is
1.2

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Solution

The correct option is A 1.2
Standard error of mean
$= \frac{σ}{\sqrt{n}} = \frac{12}{\sqrt{100}} = 1.2$

$(σ =$ S.D. of sample, n = size of the sample

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A simple random sample of 100 observations was taken from a large population. The sample mean & the standard deviation were determined to be 80 and 12 respectively. The standards error of mean is1.2

The correct option is A 1.2Standard error of mean =σ√n=12√100=1.2 (σ= S.D. of sample, n = size of the sample

A simple random sample of 100 observations was taken from a large population. The sample mean & the standard deviation were determined to be 80 and 12 respectively. The standards error of mean is
1.2

The correct option is A 1.2
Standard error of mean
$= \frac{σ}{\sqrt{n}} = \frac{12}{\sqrt{100}} = 1.2$

$(σ =$ S.D. of sample, n = size of the sample