The CEO of a large company decided to start a new initiative to provide all sales representatives with free food and drinks while they are on sales calls for the next calendar year.
At the end of the year, she followed up by randomly selecting $100$ sales representatives and compared their sales from the year before the initiative to their sales from the year of the initiative. She found that $68$ of the representatives selected had higher sales in the initiative year than in the year prior.
What is the population in this situation? What is the sample?