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There is no such thing. The standard error can be calculated for a sample of any size greater than 1.

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Q: What is the sample size for standard deviation?
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How do i find sample standard deviation from population standard deviation?

If the population standard deviation is sigma, then the estimate for the sample standard error for a sample of size n, is s = sigma*sqrt[n/(n-1)]


How does one calculate the standard error of the sample mean?

Standard error of the sample mean is calculated dividing the the sample estimate of population standard deviation ("sample standard deviation") by the square root of sample size.


Does the distribution of sample means have a standard deviation that increases with the sample size?

No, it is not.


Where the standard deviation is not applicable?

When the sample size is small


Why is standard deviation of a statistic called standard error?

The standard error is the standard deviation divided by the square root of the sample size.


Is sample size going to be equal to standard deviation?

yes


If standard deviation 20 and sample size is 100 then standard error of mean is?

2


As the sample size increases the standard deviation of the sampling distribution increases?

No.


Is The standard deviation of all possible sample proportions increases as the sample size increases?

The standard deviation would generally decrease because the large the sample size is, the more we know about the population, so we can be more exact in our measurements.


What is the sample standard deviation of 27.5?

A single observation cannot have a sample standard deviation.


What is not dependent on the size of a sample?

In general the mean of a truly random sample is not dependent on the size of a sample. By inference, then, so is the variance and the standard deviation.


What happen to confidence interval if increase sample size and population standard deviation simultanesous?

The increase in sample size will reduce the confidence interval. The increase in standard deviation will increase the confidence interval. The confidence interval is not based on a linear function so the overall effect will require some calculations based on the levels before and after these changes. It would depend on the relative rates at which the change in sample size and change in standard deviation occurred. If the sample size increased more quickly than then standard deviation, in some sense, then the size of the confidence interval would decrease. Conversely, if the standard deviation increased more quickly than the sample size, in some sense, then the size of the confidence interval would increase.