power_2t_unequal: Calculate Power for Two-Sample Unequal Variance T-Test
In vandomed/dvmisc: Convenience Functions, Moving Window Statistics, and Graphics

Description Usage Arguments Value Examples

Unequal variance version of power_2t_equal. Assumes an equal sample size for both groups, which is actually not optimal.

1	power_2t_unequal(n = 100, d, sigsq1, sigsq2, alpha = 0.05)

`n`	Numeric value specifying per-group sample size.
`d`	Numeric value specifying true difference in group means. Should be positive.
`sigsq1, sigsq2`	Numeric value specifying the variance of observations in each group.
`alpha`	Numeric value specifying type-1 error rate.

Numeric value.

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# Power to detect difference of 0.2 with 100 subjects per group and sigsq's
# of 1 and 1.25
power_2t_unequal(n = 100, d = 0.2, sigsq1 = 1, sigsq2 = 1.25)