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Review of Sampling
- Distinguish between simple random sampling and stratified sampling.
- Describe how often random and stratified sampling give exactly the same result.
The sampling simulation uses a population of 100 animals: 60 lions, 30 turtles, 10 rabbits.
: This option allows you to draw a sample of 10 animals at a time with each animal having an equal chance of being selected.
: This option allows you to draw a sample of 10 animals at a time, with each number of animals from a group being proportional to their group’s size of the population.
|The number of animals chosen from each group when a sample is drawn is shown next to the picture of the animal.|
When you give it a try:
The opening screen of the sampling simulation displays all 100 animals in the population.
You can select between a random sample and a stratified sample directly below the population and then generate a sample of ten animals.
Below is an example of a random sample. Notice that animals selected are highlighted in the population and the total number of animals selected from each category is listed at the bottom of the simulation.