Which of the following summary measures is most affected by outliers?
A) the first quartile
B) the second quartile
C) the third quartile
D) the variance

Question

Quizplus · Accepted Answer

The variance is heavily influenced by outliers because it takes into account the squared distances between each data point and the mean, making extreme values have a larger impact on the result. Quartiles are less affected by outliers since they only consider specific portions of the data.

Which of the Following Summary Measures Is Most Affected by Outliers