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AP® Statistics

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Moderate

Shape of a Bar Graph

APSTAT-EVTK81

A researcher was interested in information regarding post-traumatic seizures (PTS) among patients who have suffered from a traumatic brain injury (TBI). She surveyed a variety of ages and asked the subjects if they have suffered from a post-traumatic seizure. The results in the following graph below.

Delldot. A bar graph showing the risk of post traumatic seizures by age group. Digital image. Wikimedia Commons. N.p., 3 Mar. 2008. Web. 7 Mar. 2016.

How could one describe the shape of this graph?

A

Roughly symmetric.

B

Right skewed.

C

Left skewed.

D

Unable to tell since not all age groups were surveyed.

E

Unable to tell since the variables are categorical.