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Univariate statistics using TI-84

Univariate statistics means statistics with one variable. Your TI-84 calculator can do the complete statistical analysis if you follow the simple steps described bellow.

1. Create two lists containing the data and frequencies

Open the statistical lists:

STAT
 ► EDIT
   ► Edit...

Enter your data in list L1 and the corresponding frequencies in L2.

Additional advice:

If the lists are not empty maybe you'll want to clear these two lists before entering new values. You can do it using:

STAT
 ► EDIT
   ► ClrList
When ClrList command appears on the screen, add the name of the list to clear: L1 or L2, and then press ENTER.
(Hint: Press 2ND  1  for L1. Press 2ND  2  for L2.)

2. Use the 1-Var Stats

To get the univariate statistics use:

STAT
 ► CALC
   ► 1-Var Stats
When asked for additional information, enter the list labels:
X list: L1
FreqList: L2
Calculate – press ENTER in this line!

After pressing the ENTER button your calculator will display the results. Results include a lot of statistical parameters. The most important of them are:

x   = the mean or average
σx = the standard deviation
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