condition mean min max ZT0-3 16.525 16.525 16.525 ZT4-7 17.7134 17.7134 17.7134 ZT8-11 8.07996 8.07996 8.07996 ZT12-15 6.588155 6.588155 6.588155 ZT16-19 11.4435 11.4435 11.4435 ZT20-23 14.9968 14.9968 14.9968