condition mean min max ZT0-3 13.786494699000002 10.49745831 17.075531088 ZT4-7 39.8039110525 28.808871185 50.798950919999996 ZT8-11 125.360354975 89.57171025000001 161.1489997 ZT12-15 145.37233233 125.71613951 165.02852515 ZT16-19 59.253610537499995 53.13277043 65.374450645 ZT20-23 42.185942035 38.374313425 45.997570644999996