Experimental design

 

Choose the total sample size, the grand total of all four cells in the contingency table.

Also choose the experimental design:

•Cross-sectional. You sample subjects without regard to their exposure or disease.

•Prospective. You choose subjects based on exposure defined by the rows, and then inquire about outcome defined by the columns.

•Experimental. You assign treatments that define the row, and then tabulate outcome that defines the columns.

•Case-control-retrospective. You choose cases (with disease) and controls and these define the columns. You then look back at exposure and tabulate these results into rows.

 

Rows and columns

Enter titles for both rows and both columns.

Enter various probabilities as asked. The details depend on the experimental method you chose.

 

Random Seed

You may choose to specify a "Random seed" when simulating contingency table data. By specifying a random seed, any time you run the simulation (with the same parameters and the same random seed), you will obtain exactly the same results. This is helpful when you want to replicate the results of a previous simulation experiment, or if you want to ensure that the values do not change if the analysis is recalculated.