Practicality, A good test must work in real life, Reliability, A test must give the same results each time, Reliable test, Gives steady results you can trust, Too long, A 5-hour test takes more time and money than we need, Too many students, The student finishes in minutes, but the teacher needs hours to mark it, Unreliable result, Ali gets 85 on Monday and 52 on Friday, Mistake 1, They did not check the materials before the test, Mistake 2, The marking plan did not fit the time, Needs technology, A computer is needed, but the nearest one is very far away, Too slow to score, You cannot test students one by one with hundreds of students and few teachers

Reliability

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