Confidence intervals

Activities: In-class, small-group

• Large Sample Confidence Intervals For Means.  An activity which involves calculating a confidence interval for the mean. Submitted by Laura J. Simon.

Class lecture notes

• Concepts of confidence intervals.  A summary of confidence interval concepts including interpreting confidence intervals for a mean, difference in two means, and the relative risk.  Submitted by Bob Heckard.
• Confidence interval for a mean.  Determining the confidence interval for a mean using a small sample.  Submitted by Laura J. Simon.
• Confidence interval for proportions.  How to determine the confidence interval for sample proportions.  Submitted by Bob Heckard.

Flowcharts

• Comparing two population means. Choosing the correct procedure to compare two population means.  Submitted by Mosuk Chow.
• Confidence Intervals for the difference betweeen two population means.  How to determine the confidence intervals for the difference between two populations means.  Submitted by Mosuk Chow.

Projects

• Inference for a Mean. Students are asked to randomly sample from a population to create a confidence interval and perform a hypothesis test about a mean and the difference in paired means. Submitted by Mosuk Chow.

Videos

• Against All Odds: Inside Statistics Video 19:  Confidence Intervals.  Understand the two aspects of confidence intervals--the interval and the confidence level--and see how they are used in blood pressure studies, political and population surveys, and primate research. Included are z intervals for the mean of a normal distribution and behavior of confidence intervals.  (28:53 mins.)  Video available in Main Office and from Penn State AVS.
• For All Practical Purposes: Statistics Video 5:  Confident Conclusions.  Explores the concept of confidence interval and describes precisely what opinion polls do and do not reveal.  (28:00 mins.)  Video available from Penn State AVS.