By the end of this section, you will be able to:

Describe the different research methods used by psychologists
Discuss the strengths and weaknesses of case studies, naturalistic observation, surveys, and archival research
Compare longitudinal and cross-sectional approaches to research

This is a nice set of maps of Qatar from the Perry-Castandeda Collection which includes a map of the country, population map, map of economic activity, among others.

The Smithsonian National Museum of Natural History, in a section titled "North American Mammals," offers a general overview of the red wolf. Content includes a focus on this animal's conservation status, habitat and range, and other key facts.

Site discusses the use of sampling in research. The key statistical terms used in sampling are linked for the user to quickly find definitions. The major concepts of probability and nonprobability are also highlighted.

Collection of maps (political, geographic, thematic, topographic, etc.) related to Russia and the former Soviet Union.

Students investigate how to use sampling to make inferences about larger populations of interest, engaging in hands-on activities to select random samples and to compare samples of different sizes.

This 11-minute video lesson compares population proportions (part 1). [Statistics playlist: Lesson 59 of 85]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 10-minute video lesson compares population proportions (part 2). [Statistics playlist: Lesson 60 of 85]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 14-minute video lesson shows how to estimate the probability that the true population mean lies within a range around a sample mean .[Statistics playlist: Lesson 40 of 85]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 16-minute video lesson looks at the hypothesis test for comparing population proportions. [Statistics playlist: Lesson 61 of 85]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Learn firsthand from a young Antarctic researcher about a long-term study on the reproductive history of Weddell seals in this video segment adapted from WomenInAntarctica.com. [3:33]

The Current Population Survey (CPS) is a monthly survey of about 50,000 households conducted by the Bureau of the Census for the Bureau of Labor Statistics. The survey has been conducted for more than 50 years. The CPS is the primary source of information on the labor force characteristics of the U.S. population. Includes PDFs resources (require Adobe Reader).

This site is prepared by the U.S. Census Bureau and has numerous links to topics such as national, state, and county estimates, and much more. Estimates are also available for previous years.

Using State Facts for Students, a data access tool from the U.S. Census Bureau, students will explore data about their state and voice their opinions on how the population has changed over time. Students will work in small groups to share their opinions, practicing oral communication, and small-group discussion skills.

This lesson models how to solve problems involving samples of populations and the variability in the results of a statistical study. Provides a link to an interactive web app called "Sampling Distribution of the Sample Proportion." Includes downloadable study guide with exercises - guide also covers other topics. [9:29]

Watch this tutorial to discover how to use a sample to make a prediction about a population. [5:16]

This tutorial introduces you to unbiased sampling which can be helpful when trying to learn about a population. [5:04]

When you are trying to learn a particular characteristic of a large population, you need to be able to study an unbiased sample of that population to be able to draw accurate conclusions. Watch this video for an in-depth explanation. [5:04]