Talk:P-value

Unnecessary hedging: "Usually, T is a test statistic."

Latest comment: 11 months ago3 comments3 people in discussion

As a reader, if I read "usually" that suggests an exception. But there is no counter-example. A p-value is ALWAYS derived from a a test statistic. Therefore, Wikipedia should drop "usually" in this sentence.

I propose the sentence say "As stated above, T is a test statistic." This matches a sentence earlier in the article, this sentence is present: "The p-value is a function of the chosen test statistic and is therefore a random variable." DavidCJames (talk) 22:09, 29 June 2024 (UTC)Reply

Be bold. —DIV (1.145.104.186 (talk) 01:54, 14 August 2024 (UTC))Reply
the exception. Is not just a hypothesis actions will be reacted 2 once it becomes more technological version limited to a phone screen and the sub concise jealousy of bystanders sorry night 211.30.78.123 (talk) 18:51, 2 September 2025 (UTC)Reply

inconsist statement

Latest comment: 9 months ago1 comment1 person in discussion

"However, even if we do manage to reject the null hypothesis for all 3 alternatives, and even if we know that the distribution is normal and variance is 1" doesn't make sense, since 2 of the three alternatives were that: the distribution is not normal and the variance is not 1.Chris2crawford (talk) 17:40, 25 October 2025 (UTC)Reply

Likelihood

Latest comment: 5 months ago2 comments2 people in discussion

Is there any connection between p-value and likelihood? Since 1) the likelihood of a distribution given an event equals the probability of an event given the distribution, and 2) the p-value is the probability of an extremity given the null hypothesis, it seems to me that the p-value would be the likelihood of the distribution implied by the null hypothesis.Chris2crawford (talk) 17:46, 25 October 2025 (UTC)Reply

p-value is a probability, not likelihood (value of probability density in a point). For example, if you have thrown a coin 1000 times, and the mean is 0.8 rather than 0.5, the p-value says: "what is the probability of getting a mean 0.8 or more if the coin was fair (null hypothesis)". The likelihood would be what is the probability density of getting this series of results, so which for a fair coin is always the same (all results are as likely). ~2026-12503-62 (talk) 11:06, 25 February 2026 (UTC)Reply

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.