ssp_tost.Rd
The function determines the appropriate sample size for the expected effect with the Two One‐Sided Test method (TOST). TOST is a frequentist statistical testing approach aimed at establishing equivalence between two groups.
ssp_tost(tpr, eq_band, delta, alpha = 0.05, max_n = 10001)
tpr | Numeric. The desired long run probability of obtaining a significant result with TOST, given Delta. |
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eq_band | Numeric. The chosen width of the region for practical equivalence, i.e. the SESOI. |
delta | Numeric. The expected population effect size. In most cases, this value will be zero. |
alpha | Numeric. The level of significance. |
max_n | Integer. The maximum number of participants per group (both groups are assumed to have equal sample size). |
The function returns a list of three named numeric vectors. The sample size for group 1 `n1`, the sample size for group 2 `n2` and the associated power `tpr_out`.
if (FALSE) { SampleSizePlanner::ssp_tost(tpr = 0.8, eq_band = 0.2, delta = 0) }