`(t-test-two-sample mean-1 sd-1 n-1 mean-2 sd-2 n-2 #:variances-equal? #:variance-significance-cutoff #:tails)`procedureComputes the significance of the difference of two means given the sample standard deviations and sizes.

`(t-test-two-sample mean-1 sd-1 n-1 mean-2 sd-2 n-2 #:variances-equal? #:variance-significance-cutoff #:tails)`procedureComputes the significance of the difference of two means given the sample standard deviations and sizes.