You are given the variance of a data set. How can you use this information to find the standard deviation, and why might you want to do this?
- Add up all the variances to get the standard deviation
- Divide the variance by the number of data points to get the standard deviation
- Square the variance to get the standard deviation
- Take the square root of the variance to get the standard deviation
If you are given the variance, you can "Take the square root of the variance to get the standard deviation". This is useful because the standard deviation is in the same units as the original data, making it more interpretable.
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