condition mean min max ZT0-3 150.718145 150.718145 150.718145 ZT4-7 102.0924645 102.0924645 102.0924645 ZT8-11 146.111424 146.111424 146.111424 ZT12-15 191.38658700000002 191.38658700000002 191.38658700000002 ZT16-19 230.283434 230.283434 230.283434 ZT20-23 228.639748 228.639748 228.639748