Solve the Problem. -A Researcher Wishes to Construct a 95% Confidence Interval for Confidence

question 90

Multiple Choice

Solve the problem.
-A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n = 20 from the population. The population is normally distributed and is known. When constructing the confidence interval, the researcher should use the normal distribution; however, she incorrectly uses the t distribution. How does this incorrectly calculated confidence relate to the correct confidence interval?

• A)The calculated confidence interval is shifted to the right of the correct confidence interval.
• B)The calculated confidence interval is narrower than the correct confidence interval.
• C)The calculated confidence interval is wider than the correct confidence interval.
• D)The calculated confidence interval is shifted to the left of the correct confidence interval.

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Definitions:

Tortoise

refers to a terrestrial turtle, typically with a dome-shaped shell, known for its slow movement and long lifespan.

Developmental Perspective

An approach in psychology and other disciplines that focuses on how individuals grow and change throughout their lifespan, including physical, cognitive, and social development.

Observer Bias

A form of research error that occurs when an observer's expectations or personal beliefs influence their interpretation of experimental outcomes.

Ecological-Systems Approach

A perspective on human development that considers all of the influences from the various contexts of development. (Later renamed bioecological theory.)