Question

Identify any outliers of the data set. Then determine the effect that the outlier has on the mean.

375, 350, 400, 375, 375, 425, 350, 125, 400


I swear I get so confused with these-

Answer 1

125 is an outlier

125 changes the mean by 23 points (from 375 to 352)

Explanation:

an outlier is 1.5 times the IQR

the InterQuartile Range of this set of data is 400-350 or 50

50 x 1.5 = 75

the only data value that is 75 points from the IQR is 125