TABLE 14-8 Recently, a University Switched to a New Type of Computer-Based

question 54

Short Answer

TABLE 14-8
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.
-Referring to Table 14-8, an R chart is to be constructed for the time required to register. One way to create the lower control limit involves multiplying the mean of the sample ranges by D₃. For this data set, the value of D₃ is ________.

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Definitions:

Hearing

The physiological process by which sound waves are translated into electrical signals that the brain interprets as sound.

Decibels

A unit of measurement for the intensity of sound, representing the ratio between two quantities and often used to describe noise levels.

Air Pressure Waves

Variations in the pressure of air that are primarily responsible for the propagation of sound.

Neural Messages

Electrical and chemical signals transmitted by neurons to communicate information throughout the body and brain.