SCENARIO 18-8
Recently, a University Switched to a New Type

question 16

Short Answer

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

Optical Storage

A type of data storage that uses optical media, such as CDs and DVDs, to read and write data using lasers.

Flash Drive

A portable storage device that uses flash memory and is commonly used for data storage, backup, and transfer.

Hard Drives

Storage devices used to save and retrieve digital information using one or more rigid rapidly rotating disks coated with magnetic material.

BD

An abbreviation commonly used for Blu-ray Disc, a digital optical disc data storage format.