condition mean min max ZT0-3 13.99115 13.99115 13.99115 ZT4-7 11.231200000000001 11.231200000000001 11.231200000000001 ZT8-11 7.171355 7.171355 7.171355 ZT12-15 10.412775 10.412775 10.412775 ZT16-19 20.379649999999998 20.379649999999998 20.379649999999998 ZT20-23 15.245899999999999 15.245899999999999 15.245899999999999