Enjoy learning Statistics Online! Please be sure to share and subscribe to our YouTube channel.

**ASK THE PROFESSOR FORUM**

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 123: A sociologist claims that the average Hispanic teen male is engaging in intercourse before turning 17 years old. A 2008 study of 47 Hispanic males revealed that the mean age at which they had intercourse for the first time was 16.31 years old with a standard deviation of 1.78 years. Use a 0.01 significance level to test the sociologist’s claim that the mean age for Hispanic males to first engage in intercourse is less than 17 years old.