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Q: How to calculate the standard deviation?

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we calculate standard deviation to find the avg of the difference of all values from mean.,

Square the standard deviation and you will have the variance.

Standard deviation = square root of variance.

You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.

Standard deviation is how much a group deviates from the whole. In order to calculate standard deviation, you must know the mean.

You cannot because the standard deviation is not related to the median.

In the same way that you calculate mean and median that are greater than the standard deviation!

A z-score cannot help calculate standard deviation. In fact the very point of z-scores is to remove any contribution from the mean or standard deviation.

The standard deviation is a measure of how spread out the numbers are. Three points is needed to calculate a statistically valid meaningful standard deviation.

NO

to calculate standard deviation using pointers

=stdev(...) will return the N-1 weighted sample standard deviation. =stdevp(...) will return the N weighted population standard deviation.

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