A Pilot Work Study Has Been Conducted on a New

question 13

Essay

A pilot work study has been conducted on a new operation with four work elements.The following times,in seconds,were obtained using the continuous method.
$$\begin{array} { c } { \text { Observations } } \\\begin{array} { | c | c | c | c | c | c | c | } \hline \text { Element } & 1 & 2 & 3 & 4 & 5 & R F \\1 & 11.00 & 45.00 & 80.00 & 117.00 & 153.00 & 1.10 \\2 & 20.00 & 54.00 & 89.00 & 125.00 & 161.00 & 1.05 \\3 & 25.00 & 58.00 & 95.00 & 131.00 & 166.00 & 0.85 \\\hline\end{array}\end{array}$$
a.What is the normal time for this operation?
b.If an allowance of 20 percent is used,what is the standard time for this task?
c.What sample size is appropriate for estimating the time for element 3 within ± 3 percent of the true mean time with 95 percent confidence?

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Definitions:

Taxonomy

The science of naming, describing, and classifying organisms; see systematics.

Organisms

Individual living entities that can carry out life processes independently, ranging from bacteria and fungi to plants and animals.

Energy Flow

Passage of energy in a one-way direction through an ecosystem.

Ecosystem

The interacting system that encompasses a community and its nonliving, physical environment. Compare with community.