condition mean min max ZT0-3 116.75 116.75 116.75 ZT4-7 76.6 76.6 76.6 ZT8-11 73.3 73.3 73.3 ZT12-15 83.55 83.55 83.55 ZT16-19 165.64999999999998 165.64999999999998 165.64999999999998 ZT20-23 136.35000000000002 136.35000000000002 136.35000000000002