condition mean min max ZT0-3 2038.85 2038.85 2038.85 ZT4-7 3610.8 3610.8 3610.8 ZT8-11 3669.0 3669.0 3669.0 ZT12-15 3227.3 3227.3 3227.3 ZT16-19 3076.9 3076.9 3076.9 ZT20-23 2462.75 2462.75 2462.75