condition mean min max ZT0-3 14.356933333333332 11.8812 18.8038 ZT4-7 16.6378 16.6378 16.6378 ZT8-11 13.06335 13.06335 13.06335 ZT12-15 14.318325 12.19915 16.4375 ZT16-19 8.38407 8.38407 8.38407 ZT20-23 11.064900000000002 11.064900000000002 11.064900000000002