This script implements Abraham Wald's (147) Sequential Probability Ratio Test for the test of a normal mean (difference) with unknown variance in R.
The script implements the sequential t tests developed by Rushton (1950, 1952), commonly referred to as Barnard's t test, and Hajnal (1961). It contains R code to perform
one- or two-sided t tests with
one, two paired, or two independent samples.