This is a line graph with three lines, labelled n, n1, and n2. The horizontal axis shows the Allocation ratio, labeled 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The vertical axis shows the Total sample size, labeled 0, 1000, 2000, 3000. The line for n starts at allocation ratio = 1, sample size size = 1000, and rises slowly and then more steeply to allocation ratio = 10, sample size = 3025. The line for n1 starts at allocation ratio = 1, sample size size = 500, and rises in a straight line to allocation ratio = 10, sample size = 2750. The line for n2 starts at allocation ratio = 1, sample size size = 500, and falls less and less steeply to allocation ratio = 10, sample size = 275.

Back to Allocation ratios in clinical trials.

This page maintained by Martin Bland.

Last updated: 15 July, 2009.