Overview
Histograms are used to visualize the distribution of a single numerical variable. Unlike bar charts, which compare categories, histograms show the frequency of data within continuous intervals. They help identify the shape of the distribution (e.g., normal, skewed, bimodal).
Key Concepts
- Bins: The intervals into which the data is divided.
- Frequency: The number of data points that fall into each bin.
- Bin Width: Choosing the right width is crucial; too wide hides detail, too narrow creates noise.
Use Cases
- Analyzing the age distribution of a population.
- Checking for normality in a dataset before statistical testing.