Question

what do we need to do the variance confidence interval to get the standard deviation confidence interval?
square it
divide by 2
square root it
multiply by 2

Explanation:

The relationship between variance and standard deviation is that the standard deviation is the square root of the variance. So, to get the standard deviation confidence interval from the variance confidence interval, we need to take the square root of each endpoint of the variance confidence interval.

Answer:

Square root it