condition mean min max ZT0-3 60.523050000000005 44.793350000000004 74.7809 ZT4-7 37.379149999999996 37.379149999999996 37.379149999999996 ZT8-11 55.7144 55.7144 55.7144 ZT12-15 76.71442499999999 71.28774999999999 82.1411 ZT16-19 78.94195 78.94195 78.94195 ZT20-23 86.49765 86.49765 86.49765