Kalkulator P-nilai (saka Z)
Ngarobah skor z kana nilai p tunggal atawa ganda.
Hasilne bakal dioptimalake nalika sampeyan ngetik.
Ngenai kalkulator iki
small p-value means your data would be surprising under the null hypothesis, which counts as evidence against it. This tool 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. 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 distribution.Choose aWorked 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-Worked example:Choose aWorked 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.Choose a left-tailed test:Choose a left-tailed test:Choose a right-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a two-tailed test:Choose a
Takon-takon kang kerep diajukake
Apa tegese p-value?
Nilai p nyaéta kamungkinan, lamun hipotesis null bener, pikeun meunangkeun statistik uji anu paling henteu sami ekstrimna sareng anu diamati. Nilai p alit hartosna data anjeun moal mungkin dina hipotesis null, anu buktina ngalawan éta.
Apa tegese nilai p sing dipisahake saka nilai p sing dipisahake?
Sacara umum, dua titik anu dihubungkeun ku garis anu sami, nyaéta titik anu dihubungkeun ku garis anu sami, sarta titik anu dihubungkeun ku garis anu sami, nyaéta titik anu dihubungkeun ku garis anu sami.
0,05% saka total populasi.
0.05 ngan konvensi umum, teu hukum. Ieu hartosna 5% kamungkinan positif palsu. gumantung kana widang jeung biaya salah, ambang ketat kayaning 0.01 sering leuwih cocog.
Kepiye aku bisa ngowahi skor z dadi nilai p?
Milarian wewengkon ekor tina distribusi standar-normal di luar skor z anjeun. Alat ieu ngalakukeunana pikeun anjeun: ekor kiri nyaéta P(Z ≤ z), ekor katuhu nyaéta 1 − P(Z ≤ z), sarta nilai p dua-ekor ngagandakeun nu pangleutikna tina dua.
Apa nilai p sing gedhe bisa mbuktekake manawa hipotesis null bener?
Teu. Nilai p- ageung ngan hartosna data anjeun sasuai sareng hipotesis null, henteu yén null dibuktikeun. Kakurangan bukti ngalawan éta henteu bukti pikeun éta; anjeun ngan ukur tiasa kirang ukuran conto pikeun ngadeteksi efek.
Nalika kudu nganggo nilai p berbasis z tinimbang nilai p berbasis t?
Gunakeun nilai berbasis z lamun standar deviasi populasi geus dipikawanoh atawa sampelna badag (kira-kira n ≥ 30). Pikeun sampel leutik kalawan standar deviasi dikira, distribusi t méré nilai p anu leuwih akurat.
Apa bedane antara nilai p lan tingkat signifikansi?
Tingkat signifikansi α nyaéta ambang anu anjeun teuleum sateuacanna, contona 0. 05. Nilai p dikalkulasikeun tina data anjeun. Anjeun moal ngartos hipotesis null nalika nilai p turun di handapeun α.
API — gunakake kalkulator iki saka kode
Ngadongékeun kalkulator ieu minangka titik akhir JSON bébas — teu peryogi kunci. Kirim nilai medan di handapeun minangka parameter pitakonan atawa JSON. Waca dokumen lengkap API →
Tampilan
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);Hasilna nyaéta perkiraan pikeun pituduh umum, henteu saran finansial, médis atanapi pajak.