variance of 30 for a data, what is the standard deviation
probably sqrt (30)
To calculate the standard deviation, you need to take the square root of the variance. The variance is a measure of how spread out the data points are from the mean, while the standard deviation is a measure of the average amount by which each data point deviates from the mean.
In your case, if the variance is 30, you can calculate the standard deviation as follows:
1. Take the square root of the variance:
√(30) ≈ 5.48
Therefore, the standard deviation is approximately 5.48.