condition mean min max ZT0-3 5.2116283333333335 4.139245 7.131405 ZT4-7 2.683045 2.683045 2.683045 ZT8-11 0.0 0.0 0.0 ZT12-15 3.8205175000000002 1.504385 6.13665 ZT16-19 5.313625 5.313625 5.313625 ZT20-23 5.9929 5.9929 5.9929