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

question 117

Short Answer

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.

-Referring to Table 17-8, an R chart is to be constructed for the time required to register. One way to create the lower control limit involves multiplying the average of the sample ranges by D₃. For this data set, the value of D₃ is ________.

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Definitions:

Sleep

A naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.

Cognition

The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.

Aerobic

Pertaining to or involving oxygen-based exercise that improves the efficiency of the cardiovascular system in absorbing and transporting oxygen.

Muscle-Strengthening

Physical activities and exercises that increase muscle strength, endurance, and mass.