condition mean min max ZT0-3 7.203094999999999 7.116569999999999 7.289619999999999 ZT4-7 5.195195 5.195195 5.195195 ZT8-11 5.45178 5.45178 5.45178 ZT12-15 0 0 0 ZT16-19 7.631175 7.631175 7.631175 ZT20-23 10.614455 10.614455 10.614455