A Methods and Measurements Analyst for Digital Devices Needs to Develop

question 73

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: $$\begin{array} { l r r r r r r } \text { Observation } & 1 & 2 & 3 & 4 & 5 & 6 \\\hline \text { Time (seconds) } & 46 & 38 & 40 & 34 & 42 & 40\end{array}$$ 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:

James-Lange Theory

A hypothesis suggesting that emotions are the outcome of physical responses to occurrences.

Limbic System

A complex set of brain structures located on both sides of the thalamus, involved in emotions, memory, and arousal.

Autonomic Changes

Physiological modifications in the autonomic nervous system that regulate involuntary body functions, often in response to stress or emotional states.

James-Lange Theory

A theory of emotion that suggests emotions occur as a result of physiological reactions to events, proposing that physical reactions lead to emotional experiences.