In this question, you're asked to determine whether the value given is a parameter or a statistic.

• A parameter refers to a value that describes a characteristic of a population (the entire group being studied).
• A statistic refers to a value that describes a characteristic of a sample (a subset of the population).

In this case, the problem states that Facebook tested all of their servers and found that 99% were performing as intended. Since all servers were tested, this refers to the entire population of servers.

Thus, the correct answer is:

• Parameter (because it describes the entire population of servers).

Would you like further details or have any questions?

Here are 5 related questions to consider:

1. What is the difference between a population and a sample?
2. How do you calculate a parameter versus a statistic?
3. Can a statistic ever be used to estimate a parameter?
4. What are examples of parameters in other fields of study?
5. How do you determine if data comes from a population or a sample?

Tip: When determining if a value is a parameter or a statistic, always check if the data represents the whole population or just a sample of it.