condition mean min max ZT0-3 868.2 868.2 868.2 ZT4-7 1847.6 1847.6 1847.6 ZT8-11 1402.6 1402.6 1402.6 ZT12-15 781.0 781.0 781.0 ZT16-19 580.3 580.3 580.3 ZT20-23 732.5 732.5 732.5