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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

Problem 2

7.6 Confidence Intervals for a Population Proportion

A common statistic that is thrown around is that at least half of all new marriages will end in divorce.  A researcher followed the marriages of 1500 couples for ten years.  In that time, 800 of the couples divorced.  Use the data to form a 90% confidence interval for the true rate of divorce among new marriages.  Does this evidence support the idea that at least half of all new marriages end in divorce?

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