condition mean min max ZT0-3 0.2752476455 0.151597281 0.39889801 ZT4-7 0.82863415025 0.7228656375 0.934402663 ZT8-11 2.33830486625 1.425875977 3.2507337555 ZT12-15 4.0709678472499995 3.2146244055 4.9273112889999995 ZT16-19 1.68062820275 1.5330129909999999 1.8282434145 ZT20-23 1.7636163327499998 1.7297339155 1.79749875