condition mean min max ZT0-3 402.038461975 256.69381435 547.3831096 ZT4-7 110.998709655 104.44573700999999 117.5516823 ZT8-11 144.49138614999998 122.8132199 166.1695524 ZT12-15 137.444793025 121.65331359999999 153.23627245 ZT16-19 120.64391185000001 111.91029790000002 129.3775258 ZT20-23 165.46902397500003 152.63055735 178.30749060000002