Tests are tools used to measure performance, skills, or knowledge on a specific subject. There are several types of tests, including statistical tests, physical tests, psychomotor tests, and written tests. Statistical tests measure descriptive and interpretive results, physical tests measure body parts and size, psychomotor tests require active participation in motor skills, and written tests assess knowledge, understanding, and attitudes through exams. Each test type has further classifications, such as descriptive versus interpretive statistical tests, anthropometric physical tests, and objective versus subjective written tests.