Use the fоllоwing tо аnswer the next two questions. In 2020, а reseаrch study was conducted on the sleeping habits of George Mason students. The researchers were interested in trends of students who get at least 7 hours of sleep in a day. A random sample of George Mason students aged 18 to 24 was asked whether they slept at least 7 hours on an average night. The study was repeated in 2025. The number of George Mason students who reported getting at least 7 hours of sleep each night is shown in the table below. Slept at least 7 hours 2020 2025 Total Yes 5,000 4,200 9,200 No 3,000 3,800 6,800 Total 8,000 8,000 What is the parameter of interest in context in this problem?