Khan Academy: Techniques for Random Sampling and Avoiding Bias

How random is random? Demonstrate the different random sampling methods using a hands-on activity. Pupils use various sampling techniques to choose a random sample of elements from the periodic table. They use the different samples to...

Experimental design can be both incredibly intuitive and very high-concept when first introduced to learners. This video does a great job of discussing sampling methods and bias simply, without over-reducing...

There is bias in many aspects of our lives, and math is no exception! Learners explore provided data to understand the meaning of biased and random samples. The resource includes various data sets from the same population, and...

Transmit to your class what an unbiased sample is with this video. The video goes into detail about what an unbiased sample looks like, providing examples and listing several different types of random sampling. This could be used when...

Transmit to your class what an unbiased sample is with this video. The video goes into detail about what an unbiased sample looks like, providing examples and listing several different types of random sampling. This could be used when...

Techniques for generating a simple random sample.

Using a 2002 California Gray David recall vote as an example, young statisticians  identify sources of bias in samples and find ways of reducing and eliminating sampling bias. They consider ways to select random samples from a...

Video shows visually and reviews notation for sampling distributions of random variables. It then visually shows the distribution of the mean of the difference of two random variables and gives the formulas for the mean and variance of...

Students consider the advantages and disadvantages of various sampling techniques. They define a simple random sample and identify possible sources of bias in other types of samples. Answer Key included.

Discusses how random digit tables are used and presents two problems. Answers are accompanied by explanations.