Instruction 15-1
a Study Published in the Australian Journal of Public

question 119

Multiple Choice

Instruction 15-1
A study published in the Australian Journal of Public Health was conducted to determine whether the use of seat belts in motor vehicles depends on ethnic background.A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained,and each child was classified according to (1) ethnic background (English Speaking Background (ESB) or Non English Speaking Background (NESB) ) 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.
$$\begin{array} { | l | c | c | } \hline & \text { NESB } & \text { ESB } \\\hline \text { Seat belts wom } & 31 & 148 \\\hline \text { Seat belts not worn } & 283 & 330 \\\hline\end{array}$$
-Referring to Instruction 15-1,which test would you use to properly analyse the data in this experiment?

• A)?² test for variance.
• B)?² test for independence.
• C)?² test for differences among more than two proportions.
• D)None of the above.

---

Definitions:

Physiological Dependence

A condition characterized by the bodily reliance on a substance, where absence of the substance causes withdrawal symptoms.

Marijuana

Mild hallucinogen (also known as “pot” or “weed”) derived from the leaves and flowers of a particular type of hemp plant.

Endorphins

Endorphins are neurotransmitters produced by the brain that act as natural painkillers and mood elevators, often released in response to stress or physical activity.

Morphine

A potent opioid pain medication derived from the opium poppy used to treat severe pain.