Solve the Problem. -A Confidence Interval for a Population Mean Has a Margin

question 30

Multiple Choice

Solve the problem.
-A confidence interval for a population mean has a margin of error of 6.4. Determine the length of the confidence interval.

• A)6.4
• B)40.96
• C)12.8
• D)3.2

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Definitions:

Population Mean

The average value of all elements in a complete set of a population.

Population Standard Deviation

A measure of the dispersion or spread of a set of data points in a population dataset.

Confidence Interval

A range of values, derived from sample data, that is likely to contain the value of an unknown population parameter with a certain level of confidence.

Population Mean

The average of all observations or scores in a population.