condition mean min max ZT0-3 23.259900000000002 23.259900000000002 23.259900000000002 ZT4-7 22.666600000000003 22.666600000000003 22.666600000000003 ZT8-11 23.16995 23.16995 23.16995 ZT12-15 24.14615 24.14615 24.14615 ZT16-19 38.076499999999996 38.076499999999996 38.076499999999996 ZT20-23 28.7094 28.7094 28.7094