How to Calculate Central Tendencies with GeoGebra

Using One Variable Analysis 

1.

Open Spreadsheet mode under  View in  Menu.

2.

Input your data into column A.

3.

Select all cells with data in them.

4.

Click One Variable Analysis  .

5.

Now, you’ll get a window with a chart. Click the Show Statistics  button. If you can’t see the button, click the small triangle in the top right corner of the new window.

6.

You’ll then get a table showing these statistics:

• $\sigma$ = standard deviation (population)

• s = standard deviation (sample),

• Min = mininum,

• Max = maximum,

• Q1 = the first quartile,

• Q3 = the third quartile.

The median and mean are also provided.

Using Commands

• Open Algebra View and Spreadsheet mode under  View in  Menu.

• Enter your observations into column A in Spreadsheet mode. Select all the cells containing data and click List  in Toolbar. Change Name to Data and click OK. The list will be saved in Algebra View.

• To find the minimum, use the command

  Min(<List>)

  or

  Min(<List of Data>, <List of Frequencies>)

• To find the first quartile, use the command

  Quartile1(<List of Raw Data>)

  or

  Quartile1(<List of Numbers>, <List of Frequencies>)

• To find the median, use the command

  Median(<List of Raw Data>)

  or

  Median(<List of Numbers>, <List of Frequencies>)

• To find the third quartile, use the command

  Quartile3(<List of Raw Data>)

  or

  Quartile3(<List of Numbers>, <List of Frequencies>)

• To find the maximum, use the command

  Max(<List>)

  or

  Max(<List of Data>, <List of Frequencies>)

• To find the mode, use the command

  Mode(<List of Numbers>)

• To find the mean, use the command:

  Mean(<List of Raw Data>)

• To find the variance, use the command

  Variance(<List of Numbers>)

• To find the standard deviation, use the command

  Stdev(<List of Raw Data>)

  to get the standard deviation of a sample, or

  Stdevp(<List of Raw Data>)

  to get the standard deviation of a population.