condition mean min max ZT0-3 2525.5 2525.5 2525.5 ZT4-7 2358.0 2358.0 2358.0 ZT8-11 2240.8 2240.8 2240.8 ZT12-15 2160.95 2160.95 2160.95 ZT16-19 2410.95 2410.95 2410.95 ZT20-23 2303.5 2303.5 2303.5