TABLE 17-8
Recently, a University Switched to a New Type

question 19

Essay

TABLE 17-8
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 8 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.
$\begin{array}{rrrr} \underline {\text { Day }}& \underline {\text { Range }}& \underline {\text { Mean }}& \underline {\text { Std.Dev. }}\\ 1 & 10 & 5.250 & 3.4949 \\2 & 31 & 15.250 & 10.3060 \\3 & 13 & 20.375 & 4.9262 \\4 & 21 & 22.875 & 8.3911 \\5 & 35 & 8.500 & 11.3767 \\6 & 18 & 7.875 & 6.9372 \\7 & 25 & 11.250 & 8.5815 \\8 & 30 & 7.875 & 9.5235 \\9 & 17 & 10.250 & 6.3640 \\10 & 22 & 9.500 & 7.8740 \\11 & 27 & 7.875 & 8.7086 \\12 & 26 & 12.875 & 9.3723\end{array}$
-Referring to Table 17-8, construct an $\bar { X }$ chart for the time required to register.

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Definitions:

Coincidence-of-Wants Problem

Refers to the difficulty in barter transactions where each party needs to have what the other wants and be willing to trade for it simultaneously.

Trade by Barter

The exchange of goods or services between parties without the use of money as a medium of exchange.

Capital Goods

Long-term assets such as buildings, machinery, and equipment used by businesses to produce goods and services.

Division of Labor

Division of labor is the assignment of different parts of a manufacturing process or task to different people in order to improve efficiency.