condition mean min max ZT0-3 46.077333333333335 41.085499999999996 51.6374 ZT4-7 29.9159 29.9159 29.9159 ZT8-11 21.2761 21.2761 21.2761 ZT12-15 27.336925 25.4417 29.23215 ZT16-19 27.5845 27.5845 27.5845 ZT20-23 37.672349999999994 37.672349999999994 37.672349999999994