n_2t_equal {dvmisc} | R Documentation |
Same idea as power.t.test
. Less flexible, but faster.
n_2t_equal(d, sigsq, alpha = 0.05, beta = 0.2)
d |
Numeric value specifying true difference in group means. |
sigsq |
Numeric value specifying the variance of observations. |
alpha |
Numeric value specifying type-1 error rate. |
beta |
Numeric value specifying type-2 error rate. |
Numeric value indicating per-group sample size, rounded up to the nearest whole number.
# Per-group sample size for 90% power to detect difference of 0.2 with
# sigsq = 1
n_2t_equal(d = 0.2, sigsq = 1, beta = 0.1)