condition mean min max ZT0-3 41.02798333333334 27.317 62.17400000000001 ZT4-7 74.1711 74.1711 74.1711 ZT8-11 57.012299999999996 57.012299999999996 57.012299999999996 ZT12-15 67.42202499999999 63.1383 71.70575 ZT16-19 52.03165 52.03165 52.03165 ZT20-23 34.270799999999994 34.270799999999994 34.270799999999994