A Methods and Measurements Analyst for Digital Devices Needs to Develop

question 96

Multiple Choice

A methods and measurements analyst for Digital Devices needs to develop a time standard for the task of assembling a computer mouse. In a preliminary study, she observed one of her workers perform this task six times with the following results: $$\begin{array} { | l | c | c | c | c | c | c | } \hline \text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 \\\hline \text { Time(Seconds) } & 46 & 38 & 40 & 34 & 42 & 40 \\\hline\end{array}$$ How many observations should be made if she wants to be 86.64 percent confident that the maximum error in the observed time is .5 second? Assume that the standard deviation of the task time is four seconds.

• A) 10
• B) 12
• C) 120
• D) 144
• E) 169

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Definitions:

Abstract Ideas

Concepts that are not tangible or concrete, existing in thought or as an idea without a physical representation.

Constructs

Abstract concepts developed in the mind to understand and interpret the world around us.

Dimensions

Different aspects, elements, or components that can be measured in various contexts or situations.

Single

In a research or statistical context, it typically refers to an unmarried individual or a data point not paired or grouped with others.