*55*

The **mode** of a dataset represents the value that occurs most often.

To find the mode in a histogram, we can use the following steps:

**1.** Identify the tallest bar.

**2.** Draw a line from the left corner of the tallest bar to the left corner of the bar immediately after it.

**3.** Draw a line from the right corner of the tallest bar to the right corner of the bar immediately before it.

**4.** Identify the point where the two lines intersect. Then draw a line straight down to the x-axis. The point where the line hits the x-axis is our best estimate for the mode.

The following step-by-step example shows how to find the mode of the following histogram:

**Step 1: Identify the Tallest Bar**

First, we need to identify the tallest bar in the histogram.

This is the bar with the bin range of 16 to 20:

**Step 2: Draw the First Line**

Next, we need to draw a line from the left corner of the tallest bar to the left corner of the bar immediately after it:

**Step 3: Draw the Second ****Line**

Next, we need to draw a line from the right corner of the tallest bar to the right corner of the bar immediately before it:

**Step 4: Identify the Point of Intersection**

Next, we need to identify the point where the two lines intersect. Then draw a line straight down to the x-axis:

The point where the line hits the x-axis is our best estimate for the mode.

In this example, our best estimate for the mode is roughly **17**.

**Note**: Since the data in a histogram is grouped into bins, itâ€™s not possible to know the exact value of the mode but the method that we used here allows us to make our best estimate.

**Additional Resources**

The following tutorials explain how to perform other common tasks involving histograms:

How to Estimate the Mean and Median of Any Histogram

How to Estimate the Standard Deviation of Any Histogram

How to Compare Histograms