------------------- help for pwrdemo -------------------

Demonstration illustrating power --------------------------------

pwrdemo mean_H1 Suggested values for mean_H1 range from -1 to +5.

Description -----------

pwrdemo displays two normal distributions with sd equal to 1. The distribution for H0 has a mean of 0. The distribution for H1 gets it mean from the arguement mean_H1. The vertical line is placed so that the area in the upper tail of the H0 distribution is .05. Power is illustrated by the area of the H1 distribution to the right of the vertical line.

Examples --------

. pwrdemo 1.5 . pwrdemo 2.8

Author ------

Philip B. Ender Statistical Computing and Consulting UCLA, Office of Academic Computing enderatucla.edu