condition mean min max ZT0-3 12.32712 12.32712 12.32712 ZT4-7 11.411431 11.411431 11.411431 ZT8-11 13.117819 13.117819 13.117819 ZT12-15 12.9278385 12.9278385 12.9278385 ZT16-19 12.595478 12.595478 12.595478 ZT20-23 11.8042975 11.8042975 11.8042975