condition mean min max ZT0-3 3027.25 3027.25 3027.25 ZT4-7 4146.6 4146.6 4146.6 ZT8-11 3263.8 3263.8 3263.8 ZT12-15 3027.8999999999996 3027.8999999999996 3027.8999999999996 ZT16-19 2158.45 2158.45 2158.45 ZT20-23 2244.3 2244.3 2244.3