Because of the Rising Costs of Industrial Accidents, Many Chemical

question 17

Essay

Because of the rising costs of industrial accidents, many chemical, mining and manufacturing firms have instituted safety courses. Employees are encouraged to take these courses, which are designed to heighten safety awareness. A company is trying to decide which one of two courses to institute. To help make a decision, eight employees take course 1 and another eight take course 2. Each employee takes a test, which is graded out of a possible 25. The safety test results are shown below. $$\begin{array} { | l | l | l | l | l | l | l | l | l | } \hline \text { Course 1 } & 14 & 21 & 17 & 14 & 17 & 19 & 20 & 16 \\\hline \text { Course 2 } & 20 & 18 & 22 & 15 & 23 & 21 & 19 & 15 \\\hline\end{array}$$ Assume that the scores are normally distributed. Does the data provide sufficient evidence at the 5% level of significance to infer that the marks from course 1 are lower than those from course 2?

---

Definitions:

Executive Agencies

Agencies of the government responsible for the enforcement and administration of federal laws, usually under the direct control of the President or executive branch.

Executive Branch

A branch of government responsible for executing or enforcing laws, often headed by a president or prime minister.

Cabinet Departments

Major administrative units in the executive branch of the U.S. federal government, each headed by a Secretary, that advise the President and execute government policy.

Final Rules

The definitive set of regulations issued by an authority after considering public feedback on the proposed rules.