use data from a random sample to make inferences about a population

How Do You Find the Mean of a Data Set?

Mean is just another name for average. To find the mean of a data set, add all the values together and divide by the number of values in the set. The result is your mean! To see an example of finding the mean, watch this tutorial!
How Do You Compare the Mean and Median of Data Sets Using a Line Plot

The mean and median can help you better understand a data set. Check out this real world example involving finding and comparing the mean and median of multiple data sets.
How Do You Compare Two Data Sets Using Box-and-Whisker Plots?
How Do You Use a Sample to Make Predictions About a Population?
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!