condition mean min max ZT0-3 16.29025 16.29025 16.29025 ZT4-7 13.98095 13.98095 13.98095 ZT8-11 21.5614 21.5614 21.5614 ZT12-15 19.5579 19.5579 19.5579 ZT16-19 24.6519 24.6519 24.6519 ZT20-23 18.40005 18.40005 18.40005