EqualVariances is an option to statistical confidence interval and hypothesis test functions of two samples that specifies that unknown population variances are equal.
EqualVariances is an option for confidence interval and hypothesis test functions of two lists.
With the default setting EqualVariances->False, variances are estimated from the two samples independently if the variances are not specified as known.
With EqualVariances->True, a common pooled estimate of the variance is used for both populations if the variances are not specified as known.
EXAMPLES
Basic Examples 
