condition mean min max ZT0-3 25.7253 25.7253 25.7253 ZT4-7 21.0764 21.0764 21.0764 ZT8-11 19.00835 19.00835 19.00835 ZT12-15 21.212200000000003 21.212200000000003 21.212200000000003 ZT16-19 23.9361 23.9361 23.9361 ZT20-23 25.18355 25.18355 25.18355