condition mean min max ZT0-3 23.270071666666666 7.979165 32.1569 ZT4-7 13.7342 13.7342 13.7342 ZT8-11 7.0354 7.0354 7.0354 ZT12-15 16.47406 12.25937 20.68875 ZT16-19 26.365000000000002 26.365000000000002 26.365000000000002 ZT20-23 36.098349999999996 36.098349999999996 36.098349999999996