ShmoopTube

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Here’s an unshmoopy question you’ll find on an exam somewhere in life.

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Twenty students who have driver's licenses were asked about the number of tickets and/or

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accidents that they have had and their grade point averages.

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Don’t worry – we made sure not to conduct the survey while they were driving.

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The results of the poll are shown in the following graph. 

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Based on this graph, what can be said about a student with a 2.5 GPA?

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Other than that… they would probably have a tough time interpreting this graph?

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And here are the potential answers...

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Okay, we’re given a precise spot on the

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graph to look at, so let’s… look at it.

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We want to see what can be deduced about a student with a 2.5 GPA.

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If we look at the 2.5 line on the graph,

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we can see that there are students with 0, 1 or 3 tickets.

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And because there doesn’t seem to be much rhyme or reason to the points on this scatter plot...

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…there could just as easily be a student with 2, 4 or 300 tickets.

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Which brings us to the conclusion that… we can’t come to a conclusion.

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Since there are no patterns in this graph, we really can’t know ANYTHING about a student

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with a particular GPA.

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Which leads us to answer D – Nothing can be deduced about that student’s driving record.

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That is, GPA and driving are not correlated.

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As in, “Don’t take your eyes off the road…’

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