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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 1

9.1 Z-Interval to Compare Two Population Means: Independent Samples

A study comparing hotel rates in Rome and Paris was done using 49 rooms randomly selected from Rome and 50 rooms randomly selected from Paris.  The average price for a room in Rome was $202.71 per night with a standard deviation of $45.60, and the average price for a room in Paris was $197.40 per night with a standard deviation of $52.20.  Find the 98% confidence interval for the true mean difference between hotel room rates in Rome and Paris. Is there a significant difference between the rates?

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