condition mean min max ZT0-3 223.95 223.95 223.95 ZT4-7 177.9 177.9 177.9 ZT8-11 200.4 200.4 200.4 ZT12-15 220.55 220.55 220.55 ZT16-19 291.15 291.15 291.15 ZT20-23 314.7 314.7 314.7