Enter your up-to-80 sample data. Use either an integer, or decimal but not
fractions, such as 2/3. Then click the **Calculate** button. Blank boxes
are not included in the calculations but zeros are.

In entering your data to move from cell to cell in the data-matrix use the
**Tab key** not arrow or enter keys.

To edit your data, including add/change/delete, you do not have to click on the "clear" button, and re-enter your data all over again. You may simply add a number to any blank cell, change a number to another in the same cell, or delete a number from a cell. After editing, then click the "calculate" button.

For extensive edit or to use the JavaScriptfor a new set of data, then use the "clear" button.

For a JavaScript that computes and graph histogram of a given set of data as a tool in checking the unimodality of the population, you may use Test for Homogeneity of a Population. Notice that, in most cases the last frequency has an open-end class of its own

Statistical Thinking for Decision Making

Kindly email your comments to:

Professor Hossein Arsham