Instruction 18-14
Recently,a University Switched to a New Type of Computer-Based

question 9

Short Answer

Instruction 18-14
Recently,a university switched to a new type of computer-based registration.The registrar is concerned with the amount of time students are spending on the computer registering under the new system.She decides to randomly select eight students on each of the 12 days of the registration and determine the time each spends on the computer registering.The range,mean,and standard deviation of the times required to register are in the table that follows.
$\begin{array}{rrrr} \text { Day }& \text { Range}& \text { Mean }& \text { Std.Dev.}\\\hline1 & 10 & 5.250 & 3.4949 \\2 & 31 & 15.250 & 10.3060 \\3 & 13 & 20.375 & 4.9262 \\4 & 21 & 22875 & 8.3911 \\5 & 35 & 8.500 & 11.3767 \\6 & 18 & 7.875 & 6.9372 \\7 & 25 & 11.250 & 8.5815 \\8 & 30 & 7.875 & 9.5235 \\9 & 17 & 10.250 & 6.3640 \\10 & 22 & 9.500 & 7.8740 \\11 & 27 & 7.875 & 8.7086 \\12 & 26 & 12875 & 9.3723\end{array}$
-Referring to Instruction 18-14,an R chart is to be constructed for the time required to register.The lower control limit for this data set is ________.

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Definitions:

Independent Demand

Refers to the need for goods or services that is determined by external market forces, not linked to the production schedules of related items.

Derived Demand

A demand for a product or service that arises from the demand for another product or service. For example, demand for steel is derived from the demand for automobiles.

Decoupling Inventories

Inventories held to separate or buffer different stages of the production process, reducing dependency and potential disruptions.

Anticipated Change

A forecasted or expected modification in conditions, trends, or operations that may impact future performance.