condition mean min max ZT0-3 1436.462826 1436.462826 1436.462826 ZT4-7 1528.7327475 1528.7327475 1528.7327475 ZT8-11 1262.349635 1262.349635 1262.349635 ZT12-15 1138.641613 1138.641613 1138.641613 ZT16-19 912.279618 912.279618 912.279618 ZT20-23 948.2915949999999 948.2915949999999 948.2915949999999