condition mean min max ZT0-3 284.25 284.25 284.25 ZT4-7 68.0 68.0 68.0 ZT8-11 155.0 155.0 155.0 ZT12-15 300.95 300.95 300.95 ZT16-19 375.4 375.4 375.4 ZT20-23 144.45 144.45 144.45