ev_means_unequal

means

<p>Vector of standard deviation of the groups</p>

sig.level

ties

<p>Comparing means with unequal variances</p>

Computes the optimal sample size for various 2-group designs (e.g., when comparing the means of two groups assuming equal variances, unequal variances, or comparing proportions) when the aim is to maximize the rewards over the full decision procedure of a) running a trial (with the computed sample size), and b) subsequently administering the winning treatment to the remaining N-n units in the population. Sample sizes and expected rewards for standard t- and z- tests are also provided.

ev_means_unequal: Compute expected value as function of n, N

Description

Usage

Arguments

Value