PSS to Arrival

   Looking at just the score change from PSS to ARR, coffees beginning above 0.610 drop an average of 1.53 points with a standard deviation of change (a of △) of 2.26 compared to 0.96 and 1.89 for those beginning below 0.5.
Around 68 percent of coffees beginning above 0.610 Aw arrived between +.73 and -3., while those beginning below 0.550 arrived between +.93 and -2.85 points off their PSSs.

   We observe a half point difference in change, on average.
The larger standard deviation of score change for the higher Aw samples can magnify the half point average difference in change.

출처 : CAFE IMPORTS