A Study Published in the American Journal of Public Health

question 39

Multiple Choice

A study published in the American Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles depends on ethnic status in San Diego County. A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained, and each child was classified according to (1) ethnic status (Hispanic or non-Hispanic) and (2) seat belt usage (worn or not worn) during the accident. The number of children in each category is given in the table below. Referring to these data, which test would be used to properly analyze the data in this experiment?

• A) x2 test for independence in a two-way contingency table
• B) x2 test for equal proportions in a one-way table
• C) ANOVA F-test for interaction in a 2 × 2 factorial design
• D) x2 goodness-of-fit test

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Definitions:

Berkowitz's Theory

A psychological theory suggesting that frustration leads to aggression, and the presence of aggressive cues directs this frustration towards aggression.

Frustration

A negative emotional state resulting from blocked or unmet needs, goals, or desires.

Pain

A distressing sensation and emotional experience linked to actual or potential tissue damage.

Unpleasant Events

Events or occurrences that cause discomfort, distress, or unhappiness to an individual or group.