condition mean min max ZT0-3 103.63735 103.63735 103.63735 ZT4-7 100.7696 100.7696 100.7696 ZT8-11 84.26885 84.26885 84.26885 ZT12-15 68.7355 68.7355 68.7355 ZT16-19 63.072050000000004 63.072050000000004 63.072050000000004 ZT20-23 92.08345 92.08345 92.08345