condition mean min max ZT0-3 3.86080135025 1.7491853905 5.97241731 ZT4-7 2.2557030885 1.6693462535 2.8420599235 ZT8-11 2.16337956775 2.1236562975 2.203102838 ZT12-15 2.6430941745 2.1156423045 3.1705460445 ZT16-19 2.2629155695 1.9376518575000001 2.5881792815 ZT20-23 5.40812999225 4.350056223 6.4662037615