condition mean min max ZT0-3 6.25117139225 5.3126187725 7.189724012 ZT4-7 3.1063532499999997 2.9341658055 3.2785406944999997 ZT8-11 4.0243313975 3.40332087 4.645341925 ZT12-15 4.7633079792499995 3.8890164929999997 5.6375994655 ZT16-19 2.4456631515000002 2.3679580930000004 2.52336821 ZT20-23 3.8803652160000004 3.7718252580000002 3.988905174