condition mean min max ZT0-3 107.64406473 70.71373449 144.57439497 ZT4-7 199.52210100000002 181.07088155 217.97332045000002 ZT8-11 114.65002313 91.94111620000001 137.35893005999998 ZT12-15 46.413195224999996 44.83808181 47.98830864 ZT16-19 60.69720301500001 55.799309605000005 65.59509642500001 ZT20-23 56.295163429999995 50.209850884999994 62.380475974999996