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Interpret dot plots with fractions 1

Scientists in Antarctica measured the masses of king penguins. They plotted the masses of 1414 penguins on the line plot below.
What is the difference, in kilograms, between the heaviest penguin and the lightest penguin?
Masses are rounded to the nearest 110\dfrac{1}{10} of a kilogram.
  • Your answer should be
  • an integer, like 66
  • an exact decimal, like 0.750.75
  • a proper fraction, like 1/21/2 or 6/106/10
  • an improper fraction, like 10/710/7 or 14/814/8
  • a mixed number, like 1 3/41\ 3/4
 kg\text{ kg}