power_2t_unequal {dvmisc} | R Documentation |
Unequal variance version of power_2t_equal
. Assumes an equal
sample size for both groups, which is actually not optimal.
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.
# 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)