condition mean min max ZT0-3 56.93535411 36.36926731 77.50144091 ZT4-7 110.4147838575 91.558429565 129.27113815 ZT8-11 180.601408575 157.51948284999997 203.6833343 ZT12-15 227.65932099999998 225.49271234999998 229.82592964999998 ZT16-19 206.41631215 192.1990501 220.6335742 ZT20-23 254.955292975 245.2670099 264.64357605