An Australian Tyre Manufacturer Operates a Plant in Melbourne and Another

question 25

Essay

An Australian tyre manufacturer operates a plant in Melbourne and another plant in Adelaide. Employees at each plant have been evenly divided among three issues (wages, working conditions and super benefits) in terms of which one they feel should be the primary issue in the upcoming contract negotiations. The secretary of the union has recently circulated pamphlets among the employees, attempting to convince them that super benefits should be the primary issue. A subsequent survey revealed the following breakdown of the employees according to the plant at which they worked and the issue that they felt should be supported as the primary one. $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Issues }$
$\begin{array} { | l | c | c | c | } \hline \text { Plant Location } & \text { Very interesting } & \text { Fairly interesting } & \text { Not interesting } \\\hline \text { Melbourne } & 60 & 62 & 78 \\\hline \text { Adelaide } & 70 & 56 & 74 \\\hline\end{array}$ Can you infer at the 5% significance level that the proportional support by the employees at both plants for the issues has changed since the pamphlet was circulated?

---

Definitions:

Bomb Calorimeter

An apparatus used to measure the heat of combustion of a sample, essential in the determination of calorific values.

Conservation of Energy

A fundamental principle of physics stating that the total energy in an isolated system remains constant, though it may change forms, such as from kinetic to potential energy.

Heat Lost

The amount of heat energy that escapes or is unintentionally transferred from a system to its surroundings.

Combustible Liquid

A liquid that can ignite easily or catch fire at temperatures at or above room temperature.