condition mean min max ZT0-3 1296.001288 1296.001288 1296.001288 ZT4-7 921.2325519999999 921.2325519999999 921.2325519999999 ZT8-11 782.362922 782.362922 782.362922 ZT12-15 777.1074445 777.1074445 777.1074445 ZT16-19 1278.394565 1278.394565 1278.394565 ZT20-23 1595.1471255000001 1595.1471255000001 1595.1471255000001