# expected means and SDs ```r Summary of means (mu) and standard deviations (SD) mu SD CONDITION REPETITION 1 3.27 1.09 interest new # observed in last study 2 3.39 1.09 interest repeated # observed in last study 3 3.27 1.09 accuracy new # predicted 4 3.27 1.09 accuracy repeated # predicted ``` ![[1679261655.png]] # power simulations based on 2x2 design `n_per_condition` has to be multiplied by 2 to get the overall sample size - for at least 80% power, we should aim for 300 - ideally, n = 400 (about 90% power) ![[1679261604.png]]