condition mean min max ZT0-3 10.0349575 9.762315000000001 10.3076 ZT4-7 7.539275 7.539275 7.539275 ZT8-11 4.732855000000001 4.732855000000001 4.732855000000001 ZT12-15 0 0 0 ZT16-19 7.458265000000001 7.458265000000001 7.458265000000001 ZT20-23 9.34797 9.34797 9.34797