condition mean min max ZT0-3 10.172703 10.172703 10.172703 ZT4-7 11.671221500000001 11.671221500000001 11.671221500000001 ZT8-11 10.482750500000002 10.482750500000002 10.482750500000002 ZT12-15 11.1992305 11.1992305 11.1992305 ZT16-19 25.5975425 25.5975425 25.5975425 ZT20-23 17.7027895 17.7027895 17.7027895