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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

7.2 Large-Sample Confidence Intervals for a Population Mean

For problems 1 and 2, use the provided information to construct a confidence interval to estimate the population mean.

1. Salaries of college statistics professors at Florida public universities: Confidence level = 95%, n =36, sample mean = $85,113, and standard deviation = $11,024.

2. Speeds of drivers ticketed in a 65mph zone: Confidence level = 98%, n = 31, sample mean = 81, and standard deviation = 3.4.