condition mean min max ZT0-3 351.1 351.1 351.1 ZT4-7 232.5 232.5 232.5 ZT8-11 329.8 329.8 329.8 ZT12-15 326.1 326.1 326.1 ZT16-19 507.6 507.6 507.6 ZT20-23 410.75 410.75 410.75