In Developing a Confidence Interval Estimate for the Difference Between

question 176

Multiple Choice

In developing a confidence interval estimate for the difference between two population means, which of the following will result from an increase in the size of the sample?

• A) a wider confidence interval
• B) a narrower confidence interval
• C) a smaller critical z-value
• D) a larger critical z-value

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Definitions:

Variance

A measure of the spread of a set of data points around their mean value, indicating how much the data varies.

Binomial Random Variable

A type of random variable that results from an experiment consisting of a fixed number of independent trials, each with two possible outcomes (success or failure).

Hypergeometric Probability

The probability of a certain number of successes in draws, without replacement, from a finite population that contains exactly two kinds of objects.

Finite Population

A population set that contains a limited number of distinct units or elements.