condition mean min max ZT0-3 10.863792499999999 10.381835 11.345749999999999 ZT4-7 7.64407 7.64407 7.64407 ZT8-11 8.20752 8.20752 8.20752 ZT12-15 0 0 0 ZT16-19 15.3615 15.3615 15.3615 ZT20-23 10.63742 10.63742 10.63742