condition mean min max ZT0-3 10.44542 10.44542 10.44542 ZT4-7 8.402385 8.402385 8.402385 ZT8-11 8.306975 8.306975 8.306975 ZT12-15 12.786249999999999 12.786249999999999 12.786249999999999 ZT16-19 12.7134 12.7134 12.7134 ZT20-23 10.722529999999999 10.722529999999999 10.722529999999999