condition mean min max ZT0-3 299.616672 299.616672 299.616672 ZT4-7 282.2111425 282.2111425 282.2111425 ZT8-11 226.3235305 226.3235305 226.3235305 ZT12-15 279.3190285 279.3190285 279.3190285 ZT16-19 351.243578 351.243578 351.243578 ZT20-23 233.20799900000003 233.20799900000003 233.20799900000003