Six Sigma Green Belt

Answer: A - Range is a descriptive statistic that is most affected by an outlier data point.

Key Takeaway: Outliers are infrequent data points that fall outside of 2 or 3 standard deviations from the mean. Outliers have the potential to skew data statistics and the range of a data set is most affected by their presence. For example, if a group of individuals have an average age of 32 years with 99% of individuals placed between 20 and 45 years, a single data point of a 70 year old individual gives the data a range of 20-70 years.