condition mean min max ZT0-3 85.30501666666666 30.63355 194.553 ZT4-7 149.45499999999998 149.45499999999998 149.45499999999998 ZT8-11 131.2545 131.2545 131.2545 ZT12-15 45.131975 30.794 59.46995 ZT16-19 13.6009 13.6009 13.6009 ZT20-23 13.1309 13.1309 13.1309