When you have completed this chapter, you will be able to:

1. Define a point estimate.



2. Define level of confidence.



3. Construct a confidence interval for the population mean when the population standard deviation is known.



4. Construct a confidence interval for a population mean when the population standard deviation is unknown.



5. Construct a confidence interval for a population proportion.



6. Determine the required sample size for either an attribute or a variable.