You Wish to Construct a 95% Confidence Interval to Compare

question 22

Multiple Choice

You wish to construct a 95% confidence interval to compare two proportions.If we wish to obtain a margin of error of at most 0.05,what sample size should we take from each group? Assume equal sample sizes.

• A)769
• B)1984
• C)768
• D)385
• E)384

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Definitions:

Educated Guess

A hypothesis or assumption made based on knowledge and reasoning rather than random guessing.

Hypothesis

A preliminary hypothesis presented upon scant evidence, aimed at instigating further exploration.

Null Hypothesis

A statement used in statistical testing which suggests that there is no significant effect or difference.

Directional Research Hypothesis

A hypothesis that predicts not only that a relationship exists between variables but also the direction of that relationship.