A resort employs 3,500 managers and staff. To ascertain their employees' opinions of a proposed health insurance plan, 350 employees are surveyed at random. The proportion of the 350 employees who favor the health insurance plan represents a parameter in this scenario. What is the parameter being represented in this scenario?
1) The number of managers and staff employed by the resort
2) The number of employees surveyed
3) The proportion of employees who favor the health insurance plan
4) The total number of employees in the resort