P-Value Calculator (kuchokera Z)
Kusintha z-score kuti p-value imodzi kapena ziwiri-m'mbali.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
This p-value calculator converts a z-score (the standard-normal test statistic) into a p-value — the probability of observing a result at least as extreme as yours if the null hypothesis is true. A small p-value means your data would be surprising under the null hypothesis, which counts as evidence against it.
Choose a left-tailed, right-tailed or two-tailed test; all three p-values are shown so you can compare. The left-tailed value is P(Z ≤ z), the right-tailed value is P(Z ≥ z), and the two-tailed value is 2 × P(Z ≥ |z|) — double the smaller tail. All come from the standard-normal cumulative distribution, so this tool applies to z-tests and large-sample approximations, and the result is flagged against the conventional α = 0.05 threshold.
Worked example: a z-score of 1.96 gives a right-tailed p-value of about 0.025 and a two-tailed p-value of about 0.050 — exactly the classic 5% cutoff, which is why 1.96 is the critical value for a 95% two-sided test. Since 0.05 is not below 0.05, that result sits right on the border of significance.
Mafunso ofunsidwa nthawi zambiri
Kodi ndi chiyani p-value?
P-value ndi kuthekera, poganiza kuti null hypothesis ndi zoona, kulandira chitsimikizo stat osachepera monga extreme monga wina anaona. A ochepa p-value kumatanthauza kuti deta yanu ndi osadabwitsa pansi null hypothesis, amene ndi umboni wotsutsana nayo.
Kodi ndi chiyani chimasiyana pakati pa mfundo ya p yokhala ndi maonekedwe awiri ndi mfundo ya p yokhala ndi maonekedwe amodzi?
A two-tailed kuyesa amawerengera zotsatira zosayembekezereka m'madera awiri, kotero yake p-value ndi double the one-tailed mtengo kwa |z|. kugwiritsa ntchito two-tailed pamene inu kungoganizira kuti pali kusiyana, ndi one-tailed pamene inu anayembekezera m'madera awiri.
Kodi p < 0.05 nthawi zonse ndi yofunika?
0.05 ndi lamulo lokha, si malamulo. Zimatanthauza 5% ya mwayi wokhala ndi zotsatira zoyipa. Kutengera ndi nyanja ndi mtengo wokhala wopanda pake, maziko olimba monga 0.01 nthawi zambiri amakhala oyenera.
Kodi ndingasinthe bwanji z-score kuti p-value?
Onani kutalika kwa malire a standard- normal distribution m'mbali mwa z- score yanu. Izi zida zimachita izi kwa inu: malire a kumanzere ndi P(Z ≤ z), malire a kumanzere ndi 1 − P(Z ≤ z), ndipo malire awiri a p-value amadutsa malire awiriwa.
Kodi mfundo ya p yochuluka imasonyeza kuti mfundo yopanda malire ndi yoyenera?
Palibe. A lalikulu p-value kumatanthauza kuti data yanu ndi yogwirizana ndi null hypothesis, si kuti null ndi kutsimikiziridwa. Kulephera kwa umboni wotsutsa si umboni kwa izo; mukhoza kungokhala ndi kukula kwa chitsanzo kuzindikira zotsatira.
Kodi ndiyenera kugwiritsa ntchito z-kugwirizana p-value m'malo mwa t-kugwirizana mmodzi?
Kugwiritsa ntchito z-based mtengo pamene standard deviation ya anthu ndi yodziwika kapena mzere ndi lalikulu (kuzungulira n ≥ 30). Kwa mzere waing'ono ndi standard deviation wowerengedwa, t-kugawa amapatsa zambiri zoyenera p-mtengo.
Kodi pali kusiyana kotani pakati pa mfundo ya p ndi mfundo yofunika kwambiri?
The significance level α is a threshold you set in advance, such as 0.05. The p-value is computed from your data. You reject the null hypothesis when the p-value falls below α.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
GET https://calculator.free/api/v1/p-value/curl
curl "https://calculator.free/api/v1/p-value/?z=1.96&tail=two"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/p-value/?" + new URLSearchParams({
"z": "1.96",
"tail": "two"
}));
const data = await r.json();
console.log(data.results);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.