condition mean min max ZT0-3 1.4192927499999999 1.2724355 1.56615 ZT4-7 0.8866130000000001 0.8866130000000001 0.8866130000000001 ZT8-11 1.532965 1.532965 1.532965 ZT12-15 0 0 0 ZT16-19 2.1093 2.1093 2.1093 ZT20-23 1.480915 1.480915 1.480915