The simulation requires performing a series of actions where the final step, entering the total record count, depends on the specific data file. The correct procedure is as follows:

1. On the Data Source page, verify the data types. Click the icon next to each field name and select the correct type as specified in the image (e.g., String for Sex, Number (whole) for Year).
2. Navigate to the Population worksheet.
3. In the Data pane, locate the measure named US Population Estimates(Count).
4. Drag this US Population Estimates(Count) field onto the Text mark. The view will update to show a single number, which is the total record count.
5. In the Data pane, right-click the Total Records parameter and select Show Parameter.
6. Enter the number from step 4 into the Total Records parameter card that appears in the view.
7. Click File > Save.

Tableau Help (Official Documentation). Data Types.

Section: "Change the data type for a field in the Data Source page"

Relevance: Confirms the procedure for Step 1, which is to click the data type icon on the Data Source page grid and select the correct type (e.g., "String", "Number (whole)") from the drop-down menu.

Tableau Help (Official Documentation). Relate Your Data.

Section: "Options for validating relationships and the data model"

Relevance: Confirms the procedure for Step 3 and 4. It states: "Every table includes a count of its records, as a field named TableName(Count)... To see the count for a table, drag its Count field into the view."

Tableau Help (Official Documentation). Create Parameters.

Section: "Show a parameter control in the viz"

Relevance: Confirms the procedure for Step 5 and 6. To show the parameter control card, "right-click (Control-click) the parameter in the Data pane and select Show Parameter." The value can then be entered into this card.