condition mean min max ZT0-3 254.5 254.5 254.5 ZT4-7 2161.6 2161.6 2161.6 ZT8-11 2630.05 2630.05 2630.05 ZT12-15 2493.55 2493.55 2493.55 ZT16-19 1023.15 1023.15 1023.15 ZT20-23 273.79999999999995 273.79999999999995 273.79999999999995