condition mean min max ZT0-3 51.55 51.55 51.55 ZT4-7 101.0 101.0 101.0 ZT8-11 116.95 116.95 116.95 ZT12-15 123.3 123.3 123.3 ZT16-19 70.15 70.15 70.15 ZT20-23 74.3 74.3 74.3