Outliers pose a problem for which type of average: mean or mode? Explain why.
?
A. ?The mode; An outlier will shift the mode to a different value.
B. The mode; An outlier will decrease the frequency of the already existing mode.
C. The mean; An outlier will increase the sum of the data values, thus increasing the mean.
D. ?The mean; An outlier will decrease the sum of the data values, thus increasing the mean.
E. ?Neither; Outliers do not significantly affect either average.
Answer: C
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