# Visualizing a normal distribution

In the applet below, you control the mean and SD of size of a population of fish.

Use the applet to explore the following questions:

- How does the curve change when you increase the mean, but keep the SD constant?
- How does the curve change when you increase the SD, but keep the mean constant?
- What happens when you DECREASE the SD?
- What does the population look like when the mean and SD are approximately the same?
- What does the population look like when the mean is much larger than the SD?

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