condition mean min max ZT0-3 1.4217405 1.121946 1.721535 ZT4-7 1.74708 1.74708 1.74708 ZT8-11 1.61534 1.61534 1.61534 ZT12-15 0 0 0 ZT16-19 7.349795 7.349795 7.349795 ZT20-23 7.514045 7.514045 7.514045