Consider the data in Exercise 4.4.3. Obtain the normal q−q plot for these data. Does the plot suggest that the underlying distribution is normal? If not, use the plot to determine a more appropriate distribution. Confirm your choice with a q−q based on the quantiles using your chosen distribution.
Exercise 4.4.3
Consider the sample of data (data are in the file ex4.4.3data.rda):
(a) Obtain the five-number summary of these data.
(b) Determine if there are any outliers.
(c) Boxplot the data. Comment on the plot.