7.3 Learning Objectives Revisited

As a result of completing this chapter, you will be able to do the following:

• Explain the difference between an estimator, a point estimate, and a parameter (Section 7.1).
• Explain the practical importance of confidence intervals (Section 7.1).
• Distinguish between the standard normal distribution and the t distribution (Section 7.2).
• Construct a [latex](1-\alpha) \times 100\%[/latex] z and t confidence interval (Section 7.2).
• Interpret a confidence interval (Section 7.1).
• Explain the relationship between confidence level, precision, length of the interval, and margin of error (Section 7.1).
• Calculate the required sample size given the margin of error and confidence level (Section 7.1).