condition mean min max ZT0-3 9.62516 5.6514299999999995 12.3366 ZT4-7 6.53608 6.53608 6.53608 ZT8-11 13.151250000000001 13.151250000000001 13.151250000000001 ZT12-15 13.596575000000001 12.885950000000001 14.3072 ZT16-19 13.28305 13.28305 13.28305 ZT20-23 16.7357 16.7357 16.7357