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Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Lecture Examples

Example 110: In a 2011 report by the CDF (Children’s Defense Fund), it was reported that a random sample of 29 black males with only a high school degree earned on average $25,418. The standard deviation is estimated to be $5,500. Use the sample data and a 95% confidence level to find the margin of error *E* and the confidence interval for *µ*. A 95% confidence interval was constructed for white males, and it was found that the true mean income for white males with only a high school degree was between $33,215 and 37,399. Comparing these two intervals, can we conclude there is a significant difference between incomes for the two groups?