condition mean min max ZT0-3 10.00999 8.915980000000001 11.104 ZT4-7 8.616693333333334 8.616693333333334 8.616693333333334 ZT8-11 11.7273 11.7273 11.7273 ZT12-15 16.49855 13.196200000000001 19.8009 ZT16-19 16.5777 14.3933 18.7621 ZT20-23 0 0 0