Estimated reliability and number of days.

The top row shows the empirical distribution of estimated reliability for sedentary, LPA, and MVPA time. Each panel shows the distribution of reliability estimates based on observation periods of between 2 and 10 days with individual points showing the results for a single generated dataset. The bottom row shows the corresponding empirical distribution of the number of replicates based on the prophecy formula required to achieve RJ = 0.80 for each activity metric and observation window. Solid red circles indicate the median across 200 sampled datasets.