How to Calculate Standard Deviation if Variance Is Negative

Negative Variance Means You Have Made an Error

As a result of its calculation and mathematical meaning, variance can never be negative, because it is the average squared deviation from the mean and:

Therefore, if you have negative variance and you are wondering how to calculate standard deviation from it, first look at how you have got the negative variance in the first place. You (or the person who has calculated the variance) have made a mistake somewhere.

For example, a common mistake is that you forget to square the deviations from the mean (and that would result in a possibly negative variance).

There is simply no chance that variance can be negative if calculated correctly.

How to Calculate Standard Deviation

Here you can see how to calculate both variance and standard deviation in 4 easy steps.

Finances News

cost variance calculator calculating the standard deviation in excel covariance formula finance variance of grouped data how to put standard deviation in excel significance of variance and standard deviation formula for sample mean in statistics covariance calculator finance estimating population mean calculator excel stdev formula measures of variation calculator calculator with standard deviation add standard deviations how to calculate stdev in excel estimated standard deviation calculator excel stdev if calculating variance in excel inferential statistics examples problems calculate population standard deviation from sample standard deviation calculating mean standard deviation cv calculation excel descriptive statistics vs inferential statistics examples excel geometric mean variance standard deviation calculator sample variance definition empirical formula calculator statistics how to use stdev in excel population variance calculator formula standard deviation excel calculation of mean deviation formula to calculate mean and standard deviation