condition mean min max ZT0-3 1.5801925 1.22899 1.9313950000000002 ZT4-7 1.347148 1.347148 1.347148 ZT8-11 0.591247 0.591247 0.591247 ZT12-15 0 0 0 ZT16-19 1.23225 1.23225 1.23225 ZT20-23 2.5853 2.5853 2.5853