condition mean min max ZT0-3 302.027684 302.027684 302.027684 ZT4-7 270.469556 270.469556 270.469556 ZT8-11 156.46211449999998 156.46211449999998 156.46211449999998 ZT12-15 76.203357 76.203357 76.203357 ZT16-19 126.8128695 126.8128695 126.8128695 ZT20-23 170.71156050000002 170.71156050000002 170.71156050000002