Answer with explanation:
A population means a larger group consisting of same type elements.
4. Sending a mandatory and confidential e-mail survey to every tenth employee of a company to determine overall job satisfaction.
This is fair as every 10th person is randomly selected. So, say if the company has 1000 employees, so every 10th will become a total of 100 employees. This represent the whole population.
5. Taking a poll in the main hallway between classes to determine the number of students who would be interested in a school trip to New York City.
This is fair as you will randomly select any number of students passing through the hallway.
Rest options will produce biased results.
