3.1 * * new method to find the defect ratio experiment of work to an experiment for a reason to ยืนยันถ้า reason cannot confirm the belief of testers need to accept another alternative choice was selected because it.Not enough reason to refuse.(Fail to Reject) that choice, on the contrary, if the reason that can confirm the belief of the test can be performed, which is the first acceptable cause of each process were analyzed by experiments., and measurement of the problem with the controlled for other factors constant and then lead the way that compared with the original method with hypothesis test to see the difference with significance.
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