condition mean min max ZT0-3 1.1901157383333334 0.001217215 2.277165 ZT4-7 0.436006 0.436006 0.436006 ZT8-11 0.0 0.0 0.0 ZT12-15 1.3665242499999999 0.2559535 2.477095 ZT16-19 1.3745 1.3745 1.3745 ZT20-23 4.771 4.771 4.771