condition mean min max ZT0-3 0.8648607500000001 0.790399 0.9393225000000001 ZT4-7 1.728228 1.728228 1.728228 ZT8-11 1.1071455000000001 1.1071455000000001 1.1071455000000001 ZT12-15 0 0 0 ZT16-19 1.5539450000000001 1.5539450000000001 1.5539450000000001 ZT20-23 0.3123555 0.3123555 0.3123555