Probability and Statistics > TI 83 for Statistics > Histogram TI-83

## Histogram TI-83: Overview

Creating a **TI 83 histogram** will save you time normally wasted drawing a **histogram** on paper. If you make a data entry mistake, correcting it on a **TI 83** is a breeze. On paper, one arithmetic mistake might ruin your whole histogram. Let’s say you have a list of the heights of New York City’s tallest buildings. Here’s how to put it into the TI 83 and turn it into a histogram in a jiffy.

Watch the video, or read the steps below:

## Histogram TI-83: Steps

**Sample problem**: Make a histogram depicting the top 20 tallest buildings in New York City. The heights of the top 20 buildings (in feet) are: 1250, 1200, 1046, 1046, 952, 927, 915, 861, 850, 814, 813, 809, 808, 806, 792, 778, 757, 755, 752, and 750.

**Step 1:** Enter the data into a list. Press the STAT button and then press ENTER for the “Edit” option. Enter the first number (1250), and then press ENTER. Continue entering numbers, pressing the ENTER button after each entry.

**Step 2:** Press “2nd,” then “Y=” to choose “Stat Plot.”

**Step 3:** Press ENTER to choose plot “1.”

**Step 4:** Press ENTER. This selects “On.”

**Step 5:** Press the down arrow key (the arrow keys are at the top right), then press the right arrow key twice. Your cursor should be flashing over the histogram option, which is the top right option in the list.

**Step 6:** Arrow down to XList and enter the name of the list you entered your data in Step 1. If this is your first time building a list, you most likely entered the data in “L1,” which is the default list. If “L1” is not showing, press “2nd” then “1” to choose “L1.”

**Step 7:** Arrow down and then type “1” for “Freq.”

**Step 8:**Press the “graph” button. This will bring up a graph of the histogram on your screen. Press “Zoom” and then “Zoomstat” to view the histogram.

**Tip #1**: Press the TRACE button, and arrow back and forth from left to right. This will display the number of items in each category (n=), as well as the upper and lower class limits.

**Tip # 2**: To change the class width, press WINDOW and change the Xscl. For example, if you want a class width of 100 (probably the most suitable for the above data), change “Xscl” to “100.”

That’s how to create a Histogram TI-83!

## Example 2

Draw a histogram for the following recent test scores in a statistics class: 45, 67, 68, 69, 74, 76, 75, 77, 79, 84, 86, 90.

**Step 1:** Press STAT, then ENTER to edit L1.

**Step 2:** Enter the data from the problem into the list. Press ENTER after each entry. For example, for the first two entries you would type:

4 5 ENTER

6 7 ENTER

**Step 3:** Press 2nd, then Y= to access the **Stat Plot** menu.

**Step 4:** Press ENTER twice to turn on **Plot1**.

**Step 5:**Arrow down to **Type**, which has 6 icons to the right of it. Highlight the top right icon, which looks like a histogram, and press ENTER to select it.

**Step 6:** Make sure the **XList** entry reads “L_{1}“. If it doesn’t, arrow down to it, Press Clear, then 2nd, 1.

**Step 7:** Press Graph. You should see your Histogram.

**Tip**: If when you press Graph, you see the message “Err: Stat”, or you just don’t see a histogram like you expect to, then Press “Window,” and try different settings. Especially try changing the **Xscl** (X Scale) item to a larger value.

That’s it!

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