condition mean min max ZT0-3 133.911573 133.911573 133.911573 ZT4-7 106.12871700000001 106.12871700000001 106.12871700000001 ZT8-11 103.362145 103.362145 103.362145 ZT12-15 137.630257 137.630257 137.630257 ZT16-19 297.49760349999997 297.49760349999997 297.49760349999997 ZT20-23 391.9711755 391.9711755 391.9711755