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

question 103

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,the chart is to be used for the time required to register.The lower control limit for this data set is ________,while the upper control limit is ________.

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Definitions:

Plates Meet

Regions where tectonic plates come into contact, which can lead to geologic activity such as earthquakes, volcanic eruptions, and the formation of mountains.

Decaying Carbon Isotope

Radioactive isotopes of carbon that decay over time, often used in radiocarbon dating to determine the age of archaeological finds.

Radiometric Dating

A method used to determine the age of materials such as rocks or carbon, based on the decay rate of radioactive isotopes.

Age of Fossil

The determination of the time period from which a fossil originates, often through radiometric dating.