condition mean min max ZT0-3 14.168949999999999 12.53745 15.80045 ZT4-7 15.590900000000001 15.590900000000001 15.590900000000001 ZT8-11 29.340449999999997 29.340449999999997 29.340449999999997 ZT12-15 0 0 0 ZT16-19 35.47625 35.47625 35.47625 ZT20-23 18.0104 18.0104 18.0104