## Exam #3 Outline

Homework problem solution not covered in class from Sections 8-3, 9-1, 9-2 (MS Word Format)

Major concepts from the following sections covered:

7-1: Confidence Intervals

• Find critical values
• Calculate and interpret confidence intervals for means
• Understand what inputs change the width of the confidence interval
7-2: Sample Size:
• Use the appropriate inputs and equation to calculate a sample size.
• Understand what inputs influence the sample size and how
8-1: Hypothesis Test for Means
• Structure of the hypothesis test (5 elements)
• Define and interpret type one and type two errors
• Calculate a p-value
• Use both the test statistic/critical value and p-value approaches to testing
• Formulate one-tail (upper or lower tail) and two-tail tests.
8-3: Hypothesis Test for Proportions
• Conduct the z-test for a proportion
• Use both test statistic and p-value approach
9-1: Comparing Two Variances
• Conduct the F test
• Use the F distribution (calculate numerator and denominator degrees of freedom)
• Use the F tables.
9-2: Comparing Two Means
• Calculate the pooled standard deviation, Sp
• Formulate one- and two-tailed hypotheses
• Conduct the t-test assuming equal variances