condition mean min max ZT0-3 95.90155 65.4178 154.151 ZT4-7 122.5635 122.5635 122.5635 ZT8-11 65.46465 65.46465 65.46465 ZT12-15 74.0155 73.2524 74.7786 ZT16-19 62.31060000000001 62.31060000000001 62.31060000000001 ZT20-23 62.1646 62.1646 62.1646