When you draw samples from the population there are two things that will influence how similar the samples are to each other.
1. Whether the samples are large or small
2. Whether the individuals in the population are similar to each or not
Click the button to generate samples. When are the same averages close to each other and when are they very different?
When each sample is small then the samples can be very different from each. Larger samples tend to be more similar to each other.
When the individuals in the population are similar to each other then the samples are similar to each other. But when they are very different from each other then the samples can be very different.