condition mean min max ZT0-3 153.770518 153.770518 153.770518 ZT4-7 176.317734 176.317734 176.317734 ZT8-11 180.316391 180.316391 180.316391 ZT12-15 174.60683849999998 174.60683849999998 174.60683849999998 ZT16-19 164.9179135 164.9179135 164.9179135 ZT20-23 177.55127950000002 177.55127950000002 177.55127950000002