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

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TABLE 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.
 Day  Range  Mean  Std.Dev. 1105.2503.494923115.25010.306031320.3754.926242122.8758.39115358.50011.37676187.8756.937272511.2508.58158307.8759.523591710.2506.364010229.5007.874011277.8758.7086122612.8759.3723\begin{array} { c c l l } \text { Day } & \text { Range } & \text { Mean } & \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 18-8, 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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The equilibrium price in the market, where the quantity of items provided meets the quantity of items consumers wish to buy.

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A form of insurance coverage that pays for an individual's medical and surgical expenses.

Defensive Medicine

Medical practices conducted by a physician to avoid malpractice litigation rather than to benefit the patient's health.

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Financial assistance from the government to reduce the cost of specific business activities or investments, often to promote certain policies or industries.

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