# How a confidence interval can be used by a researcher to estimate a population average

- Describe how a confidence interval can be used by a researcher to estimate a population average.
- What is meant by the term central tendency? Explain why the central tendency is an incomplete summarization of a variable.
- What two levels of confidence are used most often, and which one is most commonly used? Explain how to obtain the most commonly used confidence interval for a percentage, andÂ an average.
- Explain average, range, standard deviation, and normal curve distribution. Describe how an average and a standard deviation are computed. Create your work on a spreadsheetÂ program (such as MS Excel), copy and paste it on a Word Document, write your answer in the Word Document
- Explain generalization. Distinguish between sample findings and population facts. How are they similar and how do they differ? Provide an example.