condition mean min max ZT0-3 25.183475 22.93575 27.4312 ZT4-7 31.966900000000003 31.966900000000003 31.966900000000003 ZT8-11 39.36725 39.36725 39.36725 ZT12-15 0 0 0 ZT16-19 38.03175 38.03175 38.03175 ZT20-23 29.2944 29.2944 29.2944