If we had classified health worker as 'rich' if they earned over $50,000 per annum and 'poor' if they earned less than $15,000 per annum then we have:. a) A categorical variable measured on a continuous scale b) A discrete variable measured on a categorical scale c) A discrete variable measured on a continuous scale d) A continuous variable measured on a discrete scale Question 5 (10 points) Which of the following are typically found in experimental designs? a) Counterbalancing b) Random allocation of participants to conditions c) Interval level independent variables d) None of the above.