- (t-test-two-sample-sse mean-1 sigma-1 mean-2 sigma-2 #:alpha #:1-beta #:tails #:sample-ratio)procedure
Returns the size of sample necessary to distinguish a normally distributed sample N(mean-1, sigma-1) from a normally distributed sample N(mean-2, sigma-2). The significance #:alpha (defaults to 0.05), power #:1-beta (0.95), sides #:tails (':both) and sample-ratio #:sample-ratio (1) may be altered.