condition mean min max ZT0-3 36.238925 35.33345 37.144400000000005 ZT4-7 29.3917 29.3917 29.3917 ZT8-11 7.823055 7.823055 7.823055 ZT12-15 0 0 0 ZT16-19 17.76325 17.76325 17.76325 ZT20-23 25.4722 25.4722 25.4722