condition mean min max ZT0-3 247.29999999999998 247.29999999999998 247.29999999999998 ZT4-7 530.6 530.6 530.6 ZT8-11 430.35 430.35 430.35 ZT12-15 403.5 403.5 403.5 ZT16-19 274.55 274.55 274.55 ZT20-23 213.0 213.0 213.0