Following are the running times (in minutes)

for the top 15 grossing movies of all time rated PG-13, and the top 15 grossing movies of all time rated R.

a. Construct back-to-back stem-and-leaf plots for these data sets.

b. Do the running times of R-rated movies differ greatly from the running times of movies rated PG or PG-13, or are they roughly similar?

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Movies Rated PG-13 Star Wars: The Force Awakens 136 Avatar 162 Titanic 194 Jurassic World The Avengers The Dark Knight Avengers: Age of Ultron The Dark Knight Rises The Hunger Games: Catching Fire 124 143 152 141 164 146 Pirates of the Caribbean: Dead Man's Chest 151 Iron Man 3 129 The Hunger Games 142 Captain Americs: Civil War 147 Spider-Man 121 Jurassic Park 127