condition mean min max ZT0-3 5.60361 4.9374400000000005 6.26978 ZT4-7 5.443915 5.443915 5.443915 ZT8-11 4.8155149999999995 4.8155149999999995 4.8155149999999995 ZT12-15 0 0 0 ZT16-19 5.78353 5.78353 5.78353 ZT20-23 5.771745 5.771745 5.771745