Question

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Answer 1

If the standard deviation is 9 and sample size is 100 then the standard error is 0.9.

Given that the mean is 80,standard deviation be 9 and sample size be 100.

We are required to find the standard error of the given data.

The standard error of a statistic is basically the standard deviation of its sampling distribution or an estimate of that standard deviation.

Standard error=σ/$\sqrt{n}$

in which σ is standard deviation and n is sample size.

Here standard deviation is 9 and sample size is 100.

Standard deviation=9/$\sqrt{100}$

=9/10

=0.9

Hence if the standard deviation is 9 and sample size is 100 then the standard error is 0.9.

Learn more about standard error at brainly.com/question/1191244

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