condition mean min max ZT0-3 45.241914025 28.46032631 62.02350174 ZT4-7 77.6655014275 74.48894157 80.842061285 ZT8-11 54.264423835 43.35898215 65.16986552 ZT12-15 10.05648438875 5.084795339499999 15.028173438 ZT16-19 6.1354562040000005 5.8540724090000005 6.416839999 ZT20-23 3.8325982745 2.8531938439999998 4.812002705