condition mean min max ZT0-3 24.766199999999998 18.6418 30.8906 ZT4-7 9.502895 9.502895 9.502895 ZT8-11 8.175025000000002 8.175025000000002 8.175025000000002 ZT12-15 0 0 0 ZT16-19 9.46633 9.46633 9.46633 ZT20-23 11.3252 11.3252 11.3252