condition mean min max ZT0-3 47.259683333333335 39.841499999999996 52.18955 ZT4-7 23.10285 23.10285 23.10285 ZT8-11 8.340785 8.340785 8.340785 ZT12-15 5.565195 5.288775 5.841615 ZT16-19 8.465705 8.465705 8.465705 ZT20-23 14.735600000000002 14.735600000000002 14.735600000000002