condition mean min max ZT0-3 0.0169539 0.0 0.0339078 ZT4-7 0.134603 0.134603 0.134603 ZT8-11 0.23827900000000002 0.23827900000000002 0.23827900000000002 ZT12-15 0 0 0 ZT16-19 0.23322299999999999 0.23322299999999999 0.23322299999999999 ZT20-23 0.3008625 0.3008625 0.3008625