condition mean min max ZT0-3 119.23575 114.9105 123.561 ZT4-7 106.672 106.672 106.672 ZT8-11 178.37 178.37 178.37 ZT12-15 0 0 0 ZT16-19 238.45350000000002 238.45350000000002 238.45350000000002 ZT20-23 161.2655 161.2655 161.2655