condition mean min max ZT0-3 0.724571 0.561232 0.88791 ZT4-7 0.8630304999999999 0.8630304999999999 0.8630304999999999 ZT8-11 1.93964 1.93964 1.93964 ZT12-15 0 0 0 ZT16-19 2.338825 2.338825 2.338825 ZT20-23 1.616045 1.616045 1.616045