condition mean min max ZT0-3 52.63688333333333 41.4727 59.74294999999999 ZT4-7 32.70355 32.70355 32.70355 ZT8-11 25.589199999999998 25.589199999999998 25.589199999999998 ZT12-15 33.297200000000004 30.05755 36.53685 ZT16-19 41.2789 41.2789 41.2789 ZT20-23 49.169200000000004 49.169200000000004 49.169200000000004