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:

African American

A term referring to citizens or residents of the United States who have total or partial ancestry from any of the native populations of Sub-Saharan Africa.

Educational Psychology

Area of psychology in which the psychologists are concerned with the study of human learning and development of new learning techniques.

University of Chicago

A prestigious private research university located in Chicago, Illinois, known for its rigorous academic programs and contributions to various fields.

African-American Woman

An individual of female gender who identifies herself as having cultural, ancestral, or racial ties to African American heritage.