condition mean min max ZT0-3 23.07025 23.07025 23.07025 ZT4-7 40.4406 40.4406 40.4406 ZT8-11 29.7875 29.7875 29.7875 ZT12-15 27.20115 27.20115 27.20115 ZT16-19 14.525 14.525 14.525 ZT20-23 27.150150000000004 27.150150000000004 27.150150000000004