The accompanying data file shows the annual return (in %) for Fidelity’s Technology and Energy mutual funds from 1982 through 2018. 

a. Construct a boxplot for the Technology variable. Does the boxplot suggest that outliers exist? 

b. Use z-scores to determine if there are any outliers for the Technology variable. Are your results consistent with part a? Explain why or why not. 

c. Construct a boxplot for the Energy variable. Does the boxplot suggest that outliers exist? 

d. Use z-scores to determine if there are any outliers for the Energy variable. Are your results consistent with part c? Explain why or why not. 

e. Use the information from the two boxplots to replace outliers with NAs. What are the new averages for the Technology and Energy variables?