# Table Distribution Probabilities

Table distributions allow you to specify the values that will be sampled along with the probability of sampling each value. This can be very useful for specifying characteristics within a heterogeneous cohort.

Table distributions require that sum of all probabilities be equal to 1 within a tolerance of 1/1,000,000,000. Earlier versions of TreeAge Pro allowed for a greater tolerance. The following instructions will help you identify and fix a probability sum error within the table.

1. Identify the table causing the distribution error.
2. In the Tables View, select the table.
3. Click the copy button in the toolbar over the table data (not the table list) in the Tables View.
4. Open a new Excel document.
5. Paste the data into Excel.
6. Create a sum field beneath the probability column.
7. Adjust the number of decimal places for the column to see the error.
8. Adjust the last row of the table by adding the required difference so that the sum is exactly 1.00000000000.
9. Select all the table data in Excel including the column headings.
10. Copy the data.
11. In the TP Tables View, click the paste button in the toolbar over the table data (not the table list) in the Tables View.
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