condition mean min max ZT0-3 0.583778 0.3325645 0.7538845000000001 ZT4-7 0.4511315 0.4511315 0.4511315 ZT8-11 1.051672 1.051672 1.051672 ZT12-15 12.1073925 2.206485 22.0083 ZT16-19 4.69295 4.69295 4.69295 ZT20-23 2.3749000000000002 2.3749000000000002 2.3749000000000002