condition mean min max ZT0-3 14.466542 14.466542 14.466542 ZT4-7 86.5800565 86.5800565 86.5800565 ZT8-11 96.17347649999999 96.17347649999999 96.17347649999999 ZT12-15 58.902845 58.902845 58.902845 ZT16-19 18.442501 18.442501 18.442501 ZT20-23 14.250898 14.250898 14.250898