Real math help.
How Do You Use a Sample to Make Predictions About a Population?
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Background Tutorials
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Use proportional relationships to solve multistep ratio and percent problems.
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How Do You Figure Out a Percent From a Part to Whole Ratio?
If you want to find a percent in a word problem, you may be able to use a ratio to help you! This tutorial shows you how to do exactly that!
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Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.
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What is an Unbiased Sample?
When you're trying to learn about a population, it can be helpful to look at an unbiased sample. An unbiased sample can be an accurate representation of the entire population and can help you draw conclusions about the population. This tutorial introduces you to unbiased sampling!
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Further Exploration
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Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.
