<prompt> Pearsons measure of skewness -Mode - MeanSDMean - ModeSDSDMode - meanMean - ModeSD  <response>: Step 1: Subtract the median from the mean: 70.5 80 -9.5.Step 2: Divide by the standard deviation: -28.5 19.33 -1.47. Caution: Pearsons first coefficient of skewness uses the mode. Therefore, if the mode is made up of too few pieces of data it wont be a stable measure of central tendency. 