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type II error

   Also found in: Medical, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
type II error
n
(Mathematics & Measurements / Statistics) Statistics the error of not rejecting the null hypothesis when it is false. The probability of avoiding such an error is the power of the test and is a function of the alternative hypothesis


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It is possible that a Type II error may have occurred in the six follow-up analyses because the validity of the Smith's has not been determined, the educational program did not have a strong enough effect, an optical evaluation was not performed on participants, or due to study limitations and weaknesses, which are discussed in the next section.
A Type I error occurs when significance is falsely declared and a Type II error occurs when important differences are not detected.
 
 
 
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