condition mean min max ZT0-3 33.209416 33.209416 33.209416 ZT4-7 113.5918275 113.5918275 113.5918275 ZT8-11 113.5069035 113.5069035 113.5069035 ZT12-15 74.4702145 74.4702145 74.4702145 ZT16-19 50.0944615 50.0944615 50.0944615 ZT20-23 39.371340000000004 39.371340000000004 39.371340000000004