condition mean min max ZT0-3 374.2 374.2 374.2 ZT4-7 359.8 359.8 359.8 ZT8-11 518.25 518.25 518.25 ZT12-15 588.75 588.75 588.75 ZT16-19 497.6 497.6 497.6 ZT20-23 393.8 393.8 393.8