EngageNY
Experiments and the Role of Random Assignment
Time to experiment with mathematics! Learners study experimental design and how randomization applies. They emphasize the difference between random selection and random assignment and how both are important to the validation of the...
Curated OER
Energy Eccentricity
Young scholars assess their own energy use to help develop an awareness of the different types of natural resources affected by consumers. Their calculations show them how much they are personally impacting the Earth. Very meaningful and...
![University of North Carolina: Eric Notebook: Cross Sectional Studies [Pdf] eBook](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "University of North Carolina: Eric Notebook: Cross Sectional Studies [Pdf] eBook")
University of North Carolina
University of North Carolina: Eric Notebook: Cross Sectional Studies [Pdf]
Explains what a cross-sectional study of a population is and how it compares with a cohort study. Its advantages, disadvantages, and limitations are discussed, and how it is used in studying health issues and risks. Includes two practice...