For a Given Level of Precision and Confidence Level, a Researcher

question 30

Multiple Choice

For a given level of precision and confidence level, a researcher determines that he needs a sample size of 400. The study found that the proportion of people who smoke is 30 percent. For the same level of precision and confidence, he would need the same sample size if the proportion of those who smoke were to change to:

• A) 40 percent.
• B) 50 percent.
• C) 60 percent.
• D) 70 percent.
• E) 100 percent.

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Definitions:

War on Drugs

A campaign of prohibition and foreign military aid and military intervention undertaken by the U.S. government with the aim of reducing the illegal drug trade.

Drug Trafficking

The illegal trade involving the cultivation, manufacture, distribution, and sale of substances subject to drug prohibition laws.

Racial Stereotypes

Generalized beliefs or assumptions about the characteristics, attributes, and behaviors of members of a particular race, often leading to simplistic and erroneous judgements.

Violent Crime

Acts of crime that involve force or the threat of force against others, including homicide, rape, robbery, and assault.