condition mean min max ZT0-3 1.3609565 1.2383929999999999 1.48352 ZT4-7 1.31604 1.31604 1.31604 ZT8-11 1.60311 1.60311 1.60311 ZT12-15 0 0 0 ZT16-19 3.605645 3.605645 3.605645 ZT20-23 1.8302399999999999 1.8302399999999999 1.8302399999999999