Section B Section B Checkpoint

Problem 1

Describe the distribution. Include a mention of the center and spread in your description.

A dot plot with about the same number of dots for all whole numbers between 2 and 12.

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Solution
Sample response: The distribution of data is fairly evenly distributed between the values 2 and 12. The center of the distribution is around 7 because there are about the same number of points on either side of that value.
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Sample Response
Sample response: The distribution of data is fairly evenly distributed between the values 2 and 12. The center of the distribution is around 7 because there are about the same number of points on either side of that value.

Problem 2

A car service company keeps track of how long it takes between when a customer requests a car and when it arrives. The data are summarized in the histogram.

A histogram showing wait times in minutes

  1. What is a typical amount of time that customers have to wait for a car to arrive? Explain your reasoning.
  2. How many customers in this group had to wait longer than 20 minutes?
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Solution
  1. Sample response: 8 minutes. Most wait times are in the 6–10 minute range, so I chose the middle value.
  2. 6
Show Sample Response
Sample Response
  1. Sample response: 8 minutes. Most wait times are in the 6–10 minute range, so I chose the middle value.
  2. 6