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Topic: Against improper sayings: H0_false, H0_true
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Luis A. Afonso

Posts: 4,743
From: LIsbon (Portugal)
Registered: 2/16/05
Against improper sayings: H0_false, H0_true
Posted: Sep 22, 2013 8:49 AM
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The correct way NHST decisions should be formulated

Ronald Fisher had stated : The null hypothesis, H0, can never be proved true or false, when we regard * to prove * exactly as the definition : no way to be denied. Furthermore as we must let a value to the type I error, the decisions are * conditioned * by the value of alpha, the maximum value of p WE ASSUME compatible with H0 true.

If you had found that:
Pvalue >= alpha, there is no sufficient evidence H0 is false
Pvalue < alpha : H0 is likely/presumably false.

Dictionary (Mac Millan): presumably: use for saying you think something is true based on what you know, although you are not really certain.

Luis A. Afonso

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