Residents of a town were surveyed to determine whether they were satisfied with the concession stand at the local park. A random sample of 200 residents was selected. All 200 responded, and 87% said they were satisfied. Based on this information, which of the following statements must be true?

$I$. Of all the town residents, 87% would say they are satisfied with the concession stand at the local park.

$II$. If another random sample of 200 residents were surveyed, 87% would say they are satisfied.