If a Confidence Interval for a Population Mean Is Found

question 10

Multiple Choice

If a confidence interval for a population mean is found to be wider than desired,the next step should be to ________.

• A)go ahead and use the confidence interval anyway
• B)take another sample of the same size as the original and use the standard deviation of the combined data for the confidence interval
• C)change the confidence level to a smaller value
• D)calculate the appropriate sample size using the standard deviation from the first sample and take a sample of that size in order to reduce the standard error

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Definitions:

Technical Expertise

Specialized knowledge and skills in a specific field or discipline, allowing individuals to perform tasks with a high degree of proficiency.

EEG

Electroencephalogram, a test that measures the electrical activity of the brain using small, flat metal discs attached to the scalp.

Sleep Study

A test conducted to diagnose and assess sleep disorders, typically involving overnight monitoring of various physiological parameters.

Brain Wave

A form of electrical activity in the brain that can be measured and is indicative of various states of consciousness.