condition mean min max ZT0-3 809.2 809.2 809.2 ZT4-7 1230.4 1230.4 1230.4 ZT8-11 1025.25 1025.25 1025.25 ZT12-15 775.5 775.5 775.5 ZT16-19 659.25 659.25 659.25 ZT20-23 866.65 866.65 866.65