The correct answer is:

Normal curve

A normal curve represents a unimodal frequency distribution, where scores (data points) are spread along the X-axis, and their frequency of occurrence is shown on the Y-axis. The normal distribution is symmetric, bell-shaped, and follows the empirical rule (68%-95%-99.7%).

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Related Questions:

1. What are the key properties of a normal distribution?
2. How does a normal curve differ from a skewed distribution?
3. What is the significance of the standard deviation in a normal distribution?
4. How does the Z-distribution relate to the normal curve?
5. What are real-life examples of normal distributions?

Tip:

In a normal distribution, the mean, median, and mode are all equal and located at the center of the curve.