# TI 83 box plot: Step by Step Instructions

Probability and Statistics > TI 83 for Statistics > TI 83 box plot

## TI 83 box plot: Overview

Graphs and charts help us make sense of data, see patterns, and identify trends. Without graphs, it can be difficult to make sense of data. For example, let’s say you have a list of IQ scores for a gifted classroom in a particular elementary school. The IQ scores are: 118, 123, 124, 125, 127, 128, 129, 130, 130, 133, 136, 138, 141, 142, 149, 150, 154. That list doesn’t tell you much about anything. However, with a chart or graph like a box plot (sometimes called a box-and-whisker plot), the data can come to life.

A box plot is a way to present the five number summary in a graphical format. The five number summary is the minimum, the maximum, the median, the first quartile Q1 and the second quartile, Q2.

## TI 83 box plot: Steps

Step 1: Press , to edit L1.

Step 2: Enter the data from the problem into the list:

Step 3: Press , to access the Stat Plot menu.

Step 4: Press to turn on Plot1.

Step 5: Arrow down to Type, which has 6 icons to the right of it. Highlight the bottom middle icon, which looks like a syringe with two plungers, and press to select it.

Step 6: Make sure the XList entry reads “L1“. If it doesn’t, arrow down to it, Press .

Step 7: Press . You should see your Box plot!

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

Check out our Youtube Channel for more statistics helps and tips!

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