condition mean min max ZT0-3 2.48731 2.082455 2.8921650000000003 ZT4-7 2.99936 2.99936 2.99936 ZT8-11 14.42685 14.42685 14.42685 ZT12-15 0 0 0 ZT16-19 10.197115 10.197115 10.197115 ZT20-23 6.59545 6.59545 6.59545