condition mean min max ZT0-3 9.45519 9.45519 9.45519 ZT4-7 9.2017415 9.2017415 9.2017415 ZT8-11 9.5315525 9.5315525 9.5315525 ZT12-15 10.0133255 10.0133255 10.0133255 ZT16-19 10.904506999999999 10.904506999999999 10.904506999999999 ZT20-23 10.221131499999998 10.221131499999998 10.221131499999998