condition mean min max ZT0-3 29.001966666666664 13.931249999999999 37.980149999999995 ZT4-7 10.05098 10.05098 10.05098 ZT8-11 26.26065 26.26065 26.26065 ZT12-15 38.64745 37.2786 40.0163 ZT16-19 40.471900000000005 40.471900000000005 40.471900000000005 ZT20-23 51.69005 51.69005 51.69005