condition mean min max ZT0-3 48.806025 43.92165 53.6904 ZT4-7 39.5037 39.5037 39.5037 ZT8-11 80.3691 80.3691 80.3691 ZT12-15 0 0 0 ZT16-19 86.05035000000001 86.05035000000001 86.05035000000001 ZT20-23 63.92465 63.92465 63.92465