condition mean min max ZT0-3 10.495975 9.152825 11.187850000000001 ZT4-7 10.36195 10.36195 10.36195 ZT8-11 12.9461 12.9461 12.9461 ZT12-15 14.18545 12.5622 15.808699999999998 ZT16-19 10.8382 10.8382 10.8382 ZT20-23 14.3814 14.3814 14.3814