The table below lists numbers of firearm injuries arranged according to circumstances and whether the firearm was a handgun or a rifle or shotgun (based on data from ?Hospitalization Charges, Costs, and Income for Firearm-Related Injuries at a University Trauma Center,? by Kizer, et al., Journal of the American Medical Association, Vol. 273, No. 22). Use a 0.05 significance level to test the claim that the injury category is independent of the type of weapon.

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Unintentional Self-Inflicted Assault Handgun Rifle or Shotgun 31 35 162 13 7. 67