Use the data in Exercise 3.43, find and interpret the median domestic gross of the top seven Marvel movies.

Data from Exercise 3.43,

The top ten movies based on Marvel comic book characters for the U.S. box office as of fall 2017 are shown in the following table, with domestic gross rounded to the nearest hundred million. 

a. Sort the domestic gross income from smallest to largest. Find the median by averaging the two middle numbers. Interpret the median in context.

b. Using the sorted data, find Q1 and Q3. Then find the interquartile range and interpret it in context. 

c. Find the range of the data. Explain why the IQR is preferred over the range as a measure of variability.

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Domestic Gross Movie ($ millions) The Avengers (2012) 677 Spiderman (2002) 602 Spiderman 2 (2004) 520 Avengers: Age of Ultron (2015) 471 Iron Man 3 (2013) 434 Spiderman 3 (2007) 423 Captain America: Civil War (2016) 408 Guardians of the Galaxy Vol. 2 (2017) 389 Iron Man (2008) 384 Deadpool (2016) 363