condition mean min max ZT0-3 0.2459065 0.2459065 0.2459065 ZT4-7 0.1016825 0.1016825 0.1016825 ZT8-11 0.0221701 0.0221701 0.0221701 ZT12-15 0.0470342 0.0470342 0.0470342 ZT16-19 0.4788985 0.4788985 0.4788985 ZT20-23 0.24654500000000001 0.24654500000000001 0.24654500000000001