condition mean min max ZT0-3 2666.25 2666.25 2666.25 ZT4-7 1827.7 1827.7 1827.7 ZT8-11 2057.2 2057.2 2057.2 ZT12-15 2381.5 2381.5 2381.5 ZT16-19 2886.6 2886.6 2886.6 ZT20-23 3360.25 3360.25 3360.25