condition mean min max ZT0-3 145.4 145.4 145.4 ZT4-7 104.7 104.7 104.7 ZT8-11 146.64999999999998 146.64999999999998 146.64999999999998 ZT12-15 117.19999999999999 117.19999999999999 117.19999999999999 ZT16-19 141.4 141.4 141.4 ZT20-23 106.5 106.5 106.5