Discrepancy in minimum sample size formula and what's being used in the worked out example at 08:22
at 08:22 (time in video)
in example of calculation of minimum sample size;
p = Pooled proportion = (µ1 - µ2)/2
but, actual calculation is (0.33 + 0.33 + 0.02)/2
I am jumping on to this one, too. The code is not compatible with the equation in the video.
"µ2 is the desired proportion of the test group because we don't have it yet"
We want to see a change that is greater than the MDE (previously worked out at 0.02), so the mean desired proportion of the test group would be the mean dp of the control group + the mde.