Consistency of the measurement from the leading test kit to test it with, no matter how many times will the test score is no different. Confidence can be calculated as a number of ways.
Consistency of measurement results from the test lead set to test the students are tested many times voters are no different. Confidence can be calculated in a number of ways.
Consistency of measurement results from the test set to test whether the test with the students remember the times showed that TAE is no different. Confidence can be calculated numerically in several ways.