One Variable Statistics
One variable data sets can be analyzed by accessing the 1-Var Stats menu. The 1-Var
Stats menu can be found as the first item under the STAT CALC menu.
The following calculations are summarized and shown on the output screen
of the calculator:
mean of x values |
|
sum of x values |
|
sum of x2 values |
|
sample standard deviation of x |
Sx |
population standard deviation of x |
|
number of data points |
n |
minimum of x values |
minX |
1st quartile |
Q1 |
median |
Med |
3rd quartile |
Q3 |
maximum of x values |
maxX |
Steps for calculating one variable statistics on the TI-82:
1. Enter the one variable data into list L1.
2. Press , , and 3:SetUp... to chose L1 from the XList under 1-Var
Stats. This instructs the calculator to use L1 as the data list. The frequency
can be set as one (1), or as another list if the original data was input with associated
frequencies.
3. Press , , and 1:1-Var Stats. The view screen should have '1-Var
Stats' on it with the blinking cursor after it.
4. Press . The statistics listed
above will be displayed for the data in list L1.
Steps for calculating one variable statistics on the TI-83:
Note: There is no set-up selection on the
CALC menu on the TI-83 calculator.
1. Enter the one variable data into list L1.
2. Press , , and 1:1-Var Stats. The view screen should have '1-Var
Stats' on it with the blinking cursor after it.
3. Input the list that you keyed the data by pressing "Alpha", and
"1"- for L1, or "2" for L2, "3" for L3, etc.
4. Press . The statistics listed
above will be displayed for the data in list L1.
Example: Use the following data to calculate one variable
statistics.
76 |
74 |
82 |
96 |
66 |
76 |
78 |
72 |
52 |
68 |
86 |
84 |
62 |
76 |
78 |
92 |
82 |
74 |
88 |
71 |
The one variable statistics calculated should look like
this: 
The first screen has an arrow just to the left of the last entry which indicates the
display continues. To view the rest of the output, arrow down until all of the
statistics are displayed. |