condition mean min max ZT0-3 19.2555194175 10.524565295 27.98647354 ZT4-7 13.19521829975 10.317701899500001 16.072734699999998 ZT8-11 18.7155480925 15.581994225 21.84910196 ZT12-15 15.02527513275 14.0065883555 16.04396191 ZT16-19 10.5889334415 10.422862423000002 10.75500446 ZT20-23 12.343060622500001 11.853270345 12.8328509