Exercise 33 looked at the running times of movies released in 2010. The standard deviation of these running times is 16.6 minutes, and the quartiles are Q1 = 98 minutes and Q3 = 116 minutes.

a) Write a sentence or two describing the spread in running times based on
i) The quartiles.
ii) The standard deviation.
b) Do you have any concerns about using either of these descriptions of spread? Explain.