A Work-Sampling Method Is Used to Determine the Proportion of the Time

question 17

Multiple Choice

A work-sampling method is used to determine the proportion of the time a worker is idle.The following information was gathered on a random basis.
$$\begin{array} { | c | c | c | } \hline \text { Day } & \begin{array} { c } \text { No. Times } \\\text { Clerk Idle }\end{array} & \begin{array} { c } \text { Total No. } \\\text { Observations }\end{array} \\\hline \text { Monday } & 8 & 26 \\\text { Tuesday } & 8 & 32 \\\text { Wednesday } & 7 & 28 \\\text { Thursday } & 7 & 34 \\\hline\end{array}$$
If the manager wants a 95 percent confidence level and a degree of precision of ± 0.03,how many MORE observations are needed?

• A) Fewer than or equal to 700
• B) Greater than 700 but fewer than or equal to 800
• C) Greater than 800 but fewer than or equal to 900
• D) Greater than 900

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Definitions:

Benzene

A cyclic compound forming the basis for many aromatic substances, distinguished by its unique resonance stability.

Organic Product

A compound or substance that has been synthesized through a chemical reaction involving organic molecules.

Mononitration Product

A compound resulting from the nitration reaction where only one nitro group has been added to a molecule.

Mononitration Product

The result of introducing one nitro group (-NO2) into a compound through a nitration reaction.