Final answer:
Thai should check the data source connection, verify that the dataset contains distinct and non-null values, ensure the COUNTD function is correctly used, and potentially create a graph suitable for either qualitative or quantitative data.
Step-by-step explanation:
When Thai encounters an issue with the COUNTD function not displaying data in his Prod Category data chart, it's important to ensure that the data source is correctly connected and that the data being counted is indeed distinct. Since COUNTD is used to count the distinct occurrences of a category, Thai should check for any data entry errors that could prevent the function from working correctly.
To make the data show, he can try the following steps:
- Verify the data connection is properly established and that the dataset is actively being referenced by the chart.
- Check that the field chosen for the COUNTD function is the correct one, and that it contains distinct and non-null values.
- Ensure that the calculation or formula involving COUNTD is correctly written and that there are no syntax errors.
- If working with sample data, ensure that the sample size is sufficient to display distinct counts.
If the data is qualitative, making a graph such as a bar chart or pie chart may help in visualizing the distinct count of categories. For quantitative data, line charts or histograms could be more appropriate to show counts or distributions.