A Methods and Measurements Analyst Needs to Develop a Time

question 84

Multiple Choice

A methods and measurements analyst needs to develop a time standard for a certain task. In a preliminary study, he observed one of his workers perform this task five times, with the following results: $$\begin{array} { | l | c | c | c | c | c | } \hline \text { Observation } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Time(Seconds) } & 84 & 76 & 80 & 84 & 76 \\\hline\end{array}$$ How many observations should be made if the analyst wants to be 99.74 percent confident that the maximum error in the observed time is two seconds? Assume that the standard deviation of the task time is four seconds.

• A) 5
• B) 6
• C) 25
• D) 36
• E) 49

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Definitions:

Perceived Ability

An individual's belief or self-assessment of their capability to perform tasks or achieve goals.

Primary Appraisal

One’s initial appraisal of a potentially stressful event (Lazarus and Folkman).

Perceived Stress Scale (PSS)

A psychological instrument used to measure the perception of stress; it assesses the degree to which situations in one’s life are appraised as stressful.

Coping Responses

The strategies and behaviors that individuals use to manage the internal and external demands of situations that are appraised as stressful.