In Developing a Confidence Interval Estimate for the Population Mean

question 11

Multiple Choice

In developing a confidence interval estimate for the population mean, which of the following is true?

• A) The larger the sample standard deviation, the wider will be the interval estimate, all other things being equal.
• B) If the population standard deviation is unknown, the appropriate critical value should be obtained from the t-distribution.
• C) The confidence interval developed from a smaller sample size will have a larger margin of error than one obtained using a larger sample size, all other things being equal.
• D) All of the above are true.

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