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

question 17

Multiple Choice

SCENARIO 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 Scenario 4-2, what is the probability that a randomly selected student did well on the
Midterm and also went bar hopping the weekend before the midterm?

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

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Definitions:

Quota Sampling

A sampling method where the selection of participants is based on pre-specified characteristics or quotas to ensure representation.

Nonprobability Sampling

A sampling technique where the samples are gathered in a process that does not give all the individuals in the population equal chances of being selected.

Simple Random Sampling

A sampling method where each member of a population has an equal chance of being selected, minimizing bias in the sample collected.

Exit Polling

A survey of voters taken immediately after they have exited the polling stations, primarily used to predict election outcomes before the official count.