Which of the following is true when it comes to usefulness and usability of a data set? Select two answers.

a. Data that is useful is always usable

b. Data that is usable is always useful

c. Data can be useful but not usable

d. Data can be usable but not useful

Data can be useful but not usable

Data can be usable but not useful

Explanation:

It is important to note that not all data that is useful is always usable. For example, you may want to calculate the mean of the math scores of student in a class, but you have the data for the age of all the students in the class, while this data might be useful, it is not usable for the purpose you want at that moment. Also, not all data that is usable is useful. However data can be useful but not usable, and data can be usable, but not useful.