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 STAT ENTER, to edit L1.
Step 2: Enter the data from the problem into the list:
1 1 8 ENTER
1 2 3 ENTER
1 2 4 ENTER
1 2 5 ENTER
1 2 7 ENTER
1 2 8 ENTER
1 2 9 ENTER
1 3 0 ENTER
1 3 0 ENTER
1 3 3 ENTER
1 3 6 ENTER
1 3 8 ENTER
1 4 1 ENTER
1 4 2 ENTER
1 4 9 ENTER
1 5 0 ENTER
1 5 4 ENTER
Step 3: Press 2nd Y=, to access the Stat Plot menu.
Step 4: Press ENTER ENTER 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 ENTER to select it.
Step 6: Make sure the XList entry reads “L1“. If it doesn’t, arrow down to it, Press Clear 2nd 1.
Step 7: Press Graph. You should see your Box plot!
Tip: If when you press Graph, you see the message “Err: Stat”, or you just don’t see a box plot like you expect to, then press Window, 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!
If you prefer an online interactive environment to learn R and statistics, this free R Tutorial by Datacamp is a great way to get started. If you're are somewhat comfortable with R and are interested in going deeper into Statistics, try this Statistics with R track.Comments are now closed for this post. Need help or want to post a correction? Please post a comment on our Facebook page and I'll do my best to help!