It is not called anything special, just 2 standard deviations or 3 sd.
The standard deviation of 2 3 5 6 = 1.8257
standard diviation is variance1/2
1. Standard deviation is not a measure of variance: it is the square root of the variance.2. The answer depends on better than WHAT!
It is mean + 2*standard deviation.
2
The standard deviation of 2 3 5 6 = 1.8257
2 times the standard deviation!
4.55% falls outside the mean at 2 standard deviation
standard diviation is variance1/2
Standard deviation is the square root of the variance. Since you stated the variance is 4, the standard deviation is 2.
Variance = 17.9047619 Standard Deviation = 4.23140188
From the online calculator, see related link, the standard deviation is 4.06202.
standard deviation is the square roots of variance, a measure of spread or variability of data . it is given by (variance)^1/2
1. Standard deviation is not a measure of variance: it is the square root of the variance.2. The answer depends on better than WHAT!
2
It is mean + 2*standard deviation.
Standard deviation and variance