condition mean min max ZT0-3 109.616673 109.616673 109.616673 ZT4-7 304.267838 304.267838 304.267838 ZT8-11 299.990534 299.990534 299.990534 ZT12-15 153.9772355 153.9772355 153.9772355 ZT16-19 189.533933 189.533933 189.533933 ZT20-23 204.26338099999998 204.26338099999998 204.26338099999998