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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
7.5 Small-Sample Confidence Intervals for a Population Mean
A sample of 28 healthy babies has an average birth weight of 6.83 lbs and a standard deviation of 1.53 lbs. Construct a 95% confidence interval for the true average weight for healthy babies. If another study revealed that babies exposed to cocaine prenatally had an average birth weight of 4.92 lbs, does it seem that cocaine might lead to lower than normal birth weights?
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