The Chair of the Operations Management Department at Quality University

question 33

Multiple Choice

The chair of the operations management department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are in control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results: $$\begin{array} { l r } \text { Instructor } & \text { Number of Failures } \\\hline \text { Prof. A } & 13 \\\text { Prof. B } & 0 \\\text { Prof. C } & 11 \\\text { Prof. D } & 16\end{array}$$
What is the estimate of the mean proportion of failures for these instructors?

• A) .10
• B) .11
• C) .13
• D) .16
• E) .40

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Definitions:

Usable Forms

Refers to resources or materials that have been converted into a state where they are ready for use by organisms or human technologies.

Nitrogen

A chemical element with the symbol N and atomic number 7, making up about 78% of the Earth's atmosphere and essential for living organisms.

Nitrite Ions

An anion with the chemical formula NO2-, derived from nitrous acid, commonly found in soil and water where it participates in the nitrogen cycle.

Nitrification

A microbiological process where ammonia is oxidized to nitrite and then to nitrate, which is a key step in the nitrogen cycle in ecosystems.