In a study, the number of books in each person's home was recorded. What level of measurement is this? This is an important distinction to make, as it will determine which statistical tests can be used on the data.The number of books in each person's home is a ratio level of measurement. This is because the number of books has a true zero, and the values can be meaningfully compared. For example, we can say that one person has twice as many books as another person.
