Estimate Sample Size Based on Precision Rather than Power //
Estimate sample size based on precision rather than power.
'precisely' is a study planning tool to calculate sample size
based on precision. Power calculations are focused on whether
or not an estimate will be statistically significant;
calculations of precision are based on the same principles as
power calculation but turn the focus to the width of the
confidence interval. 'precisely' is based on the work of
Rothman and Greenland (2018) doi: 10.1097/EDE.0000000000000876.