condition mean min max ZT0-3 34.39495 33.34595 35.44395 ZT4-7 40.1463 40.1463 40.1463 ZT8-11 32.9332 32.9332 32.9332 ZT12-15 0 0 0 ZT16-19 42.34125 42.34125 42.34125 ZT20-23 39.166399999999996 39.166399999999996 39.166399999999996