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Curated Video
An Introduction to Statistical Hypothesis Testing
The video is a lecture presentation on statistical hypothesis testing. The presenter introduces the concept of hypothesis testing and explains why it is necessary in scientific research. They define key terms such as null hypothesis,...
Curated OER
What Does It Mean When an Inequality is a Contradiction or Has No Solution?
If you plug in a value for a variable in an inequality and you get a contradiction then the inequality has no solution. Is that really possible? Yes, it is. Watch this video and see the several examples that the instructor will present...
Virtual Nerd
Virtual Nerd: What Does It Mean When an Equation Has No Solution?
Watch this video tutorial and learn what it takes for an equation to have no solution. [3:46]
Khan Academy
Khan Academy: Worked Examples: Geometry: Ca Geometry: Proof by Contradiction
Students explore how to do a geometric proof by contradiction.