condition mean min max ZT0-3 11.148813010000001 10.51049092 11.7871351 ZT4-7 11.47794328375 9.7804854575 13.17540111 ZT8-11 19.82738289 15.885772900000001 23.76899288 ZT12-15 16.92542158025 15.5067005575 18.344142602999998 ZT16-19 10.11565685 9.015879524999999 11.215434175 ZT20-23 15.91601899 14.625968180000001 17.206069799999998