The Statistics 2Var App is useful for performing regressions on sets of xy data both graphically and numerically As usual, you should check out the online Help before using this feature.
In the examples below, we will generate and analyze 2 variable data using MAKELIST/L1 and Spreadsheet/User variable. These will be referred to when using the Statistics 2 variable App.
Example 1 - Use MAKELIST command and list L1
If we open the Statistics 2Var App then click the Num view, we can enter numerical data directly as shown. For this example, I just keyed into C1 ascending numbers 1-8
We could key in another column of data (C2), but instead, lets create some data using the MAKELIST command then store it in a list L1.
In Home view, create a list using MAKELIST:
Now store this new list into L1:
Next, in the Symb view, enter S1: C1 and L1 for the X and Y data. For Type1: Linear then OK Click Plot to see the plot of L1 versus C1 along with the linear best fit line. From here, I normally adjust the plot using Shift Plot (settings) for the graph shown.
Although this graph may be interesting, the linear fit seems poor. Try other Type1: fits.
Note that in this example (1) we generated data using a command MAKELIST() and (2) stored it in a predefined list location L1. In general, you can create numerical lists in other ways - keying in, generating with other commands so you dont have to use MAKELIST(). Also, there is nothing magic about list L1. Feel free to use L0-L9 or a custom name like mylist. mylist can be referred to in the statistics app just like L1 can. Note that mylist will also show up as a User Variable and at the bottom of the lists (Shift Lists).
Example 2 - Use Spreadsheet/User variables
In this example, we will generate both x data and y data in a spreadsheet app, save the data (xda, yda) then refer to them in the Statistics 2Var App.
Start by creating a new spreadsheet app to work in.
Now, pick two columns for the x data and y data. Enter (or generate) as many rows as you wish. In example shown, I created 30 rows of data.
Now, as in Example 1, we can create saved lists that refer to the two columns of data in the spreadsheet. To do this, I entered two cell formulas in cells D4 and D5 as shown.
If you want to check, leave the spreadsheet app and find the new xda, yda lists in user variables.
Now, return to the Statistics 2Var App, Symb view. Enter S2: xda and yda. Uncheck S1: plot and check the S2: plot as shown.
Now, Plot gives the following for my xda, yda data (after I messed around with the Shift Plot (settings) )...
As in prior examples,pressing Menu then Defn will give the fitted model and Num then stats will give regression statistics.
Try the following on your own:
 if you want to save a couple of keystrokes, you could enter MAKELIST(.....) Sto L1 all on one line
 Alternately, you could type in MAKELIST. Or, when in Catlg, press M (+/- key) to take you to the beginning of M catalog items.
 Alternately, you could type in L1.
 I named mine SS STATS - try to be descriptive, short and all upper or lower case to ease retyping later.
 I added the special formatting (colors, alignment etc) to make it easier to use later. Select and Format are useful for this in the spreadsheet app. I also “hid” rows 7-25 by setting their height to zero (temporarily).