Research Methods Knowledge Base - Statistical Terms in Sampling
This site explores various important statistical terms used in the process of sampling. It also includes a discussion of concepts of sampling distribution, sampling error, and confidence intervals.
Yale University - Confidence Intervals
This site is a good resource for students to study the importance of confidence intervals. It defines the term and provides relevant examples, along with graphics.
U.S. Department of Health
This website by the U.S. Department of Health in New York asks what a confidence interval is, and tells the importance of the concept, along with how it is computed.
Pennsylvania State University
This website examines the chi square test by providing a synopsis of its role in statistical analysis, along with example data and steps for how it is calculated.