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Home > CC1 > Chapter 8 > Lesson 8.2.1 > Problem 8-83

8-83.
  1. pic Levi used the box plot below to say, “Half of the class walked more than 30 laps at the walk-a-thon.” Levi also knows that his class has more than 20 students. Homework Help ✎

  2. final stop lightpic

    1. Do you agree with him? Explain your reasoning. If you do not agree with him, what statement could he say about those who walked more than 30 laps?

    2. Levi wants to describe the portion of students who walked between 20 and 30 laps (the box). What statement could he say?

    3. How could you alter a single data point and not change the graph? How could you change one data value and only move the median to the right?

    4. Can you determine how many students are in Levi’s class? Explain why or why not.

If half of the class walked more than thirty laps, then the median would be at 30.

The portion of students who walked between 20 and 30 laps is the interquartile range.
What percentage of the students does this represent?

You could change one of the data points between 30 and the maximum, but keep in the same range of values.
You could add data greater than the current median.

No, you cannot determine this information from the data in the box plot.