condition mean min max ZT0-3 47.103566666666666 10.4214 66.1027 ZT4-7 22.4591 22.4591 22.4591 ZT8-11 36.962500000000006 36.962500000000006 36.962500000000006 ZT12-15 94.2961 47.3517 141.2405 ZT16-19 234.66649999999998 234.66649999999998 234.66649999999998 ZT20-23 215.71800000000002 215.71800000000002 215.71800000000002