condition mean min max ZT0-3 30.298924999999997 29.680949999999996 30.9169 ZT4-7 29.29805 29.29805 29.29805 ZT8-11 56.2234 56.2234 56.2234 ZT12-15 0 0 0 ZT16-19 64.45125 64.45125 64.45125 ZT20-23 39.1783 39.1783 39.1783