condition mean min max ZT0-3 13.954150000000002 13.954150000000002 13.954150000000002 ZT4-7 10.74205 10.74205 10.74205 ZT8-11 11.5388 11.5388 11.5388 ZT12-15 18.56185 18.56185 18.56185 ZT16-19 25.96195 25.96195 25.96195 ZT20-23 16.57055 16.57055 16.57055