TABLE 4-2 An Alcohol Awareness Task Force at a Big-Ten University Sampled

question 109

Multiple Choice

TABLE 4-2
An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained.

-Referring to Table 4-2, what is the probability that a randomly selected student did well on the midterm or went bar hopping the weekend before the midterm?

• A) 30/200 or 15%
• B) (80 + 30)/200 or (30 + 80)/200 or 55%
• C) (30 + 70)/200 or (70 + 30)/200 or 50%
• D) (80 + 30 + 70)/200 or (110 + 100 - 30)/200 or 90%

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Definitions:

Beta Amyloid

A naturally occurring protein in the brain, known to play a critical role in the development of Alzheimer’s disease when it accumulates abnormally.

Alzheimer's Disease

A progressive neurodegenerative disorder that is the most common cause of dementia, characterized by memory loss, cognitive decline, and personality changes.

Plaques

Deposits of a protein fragment called beta-amyloid that build up in the spaces between nerve cells, often found in the brains of individuals with Alzheimer's disease.

Tangles

Abnormal accumulations of tau protein inside brain cells, commonly associated with Alzheimer’s disease and other neurodegenerative conditions.