A Researcher Wants to Estimate the Proportion of a Population

question 26

Multiple Choice

A researcher wants to estimate the proportion of a population which possesses a given characteristic.A random sample of size 200 is taken and 30% of the sample possesses the characteristic.The 90% confidence interval to estimate the population proportion is ___.

• A)0.53 to 0.67
• B)0.25 to 0.35
• C)0.24 to 0.36
• D)0.27 to 0.33
• E)0.33 to 0.39

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Definitions:

Biased Sample

A sample that does not accurately represent the population from which it was drawn, often leading to skewed results.

Population

A group of individuals of the same species living and interbreeding within a given area.

Independent Variable

The variable that is manipulated or changed in an experiment to test its effect on the dependent variable.

Statistically Significant

A term in statistical hypothesis testing used to denote that the results obtained are unlikely to have occurred by chance, at a specified level of significance.