condition mean min max ZT0-3 0.8620305 0.8620305 0.8620305 ZT4-7 0.48581299999999994 0.48581299999999994 0.48581299999999994 ZT8-11 0.573507 0.573507 0.573507 ZT12-15 0.6695575 0.6695575 0.6695575 ZT16-19 1.311055 1.311055 1.311055 ZT20-23 0.813689 0.813689 0.813689