condition mean min max ZT0-3 43.90965 43.6236 44.1957 ZT4-7 26.07895 26.07895 26.07895 ZT8-11 36.7551 36.7551 36.7551 ZT12-15 0 0 0 ZT16-19 51.4269 51.4269 51.4269 ZT20-23 48.6757 48.6757 48.6757