Te tātaitai P-Uara (mai i Z)
Ka tahuri tētahi pūkete z ki tētahi uara p kotahi, rua rānei.
Ka whakahōutia ngā hua i te wā e tātuhi ana.
Mo tēnei tātaitai
small p-value means that your data would be surprising under the null hypothesis, which counts as evidence against it. A large p-value means that 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 cumulative distribution, so this
Ko nga pātai e pā ana
He aha te uara-p?
Ko te uara p te tūponotanga, e whakaaro ana ko te ariā kore te pono, kia whiwhi ai i tētahi tatauranga whakamātautau i te iti rawa o te tino nui rawa i te mea i kitea. Ko te tikanga o tētahi uara p iti, kāore e taea e tōna raraunga te āhua o te ariā kore, he whakaaturanga ā-whāiti.
He pēhea te rerekētanga o te uara p-rua-rua i te kotahi?
Ko te whakamātautau ā-rua e tatau ana i ngā hua tino nui i ngā aronga e rua, kia rua ai tōna uara p ki te uara kotahi mō te ōrite |z|. Ka whakamahia te ā-rua ina māharahara anake koe i te rerekētanga, me te ā-rua ina matapae rānei i te aronga i mua.
He mea nui tonu te p <0.05?
Ko te 0.05 anake he whakaaetanga noa iho, ehara i te ture. Ko te tikanga he 5% te tūponotanga o tētahi tōrunga hē. I runga anō i te āpure me te utu o te hē, he tino tika ake ngā taumata ātete pēnei i te 0.01.
He pēhea te tahuri i tētahi pūkete z ki tētahi uara p?
Ka rapu i te rohe kōaro o te tuaritanga pūnoa-pātahi i tua atu i tō tātou pūkete z. Ka mahi tēnei utauta mō tātou: ko te kōaro mauī ko P(Z ≤ z), ko te kōaro matau ko 1 − P(Z ≤ z), ā, ko te uara p-taurua e rua te iti iho o ngā rua.
E whakaatu ana te uara p nui i te pono o te whakaaro kore?
Kāore. Ko te tikanga anake o tētahi uara p nui, he ōrite tō tātau raraunga ki te whakaaro kore, kāore i te whakamātautia te kore. Kāore te kore whakaaturanga ki a ia he whakaaturanga mō; kāore pea i te nui tauira kia kitea ai tētahi pānga.
Ka whakamahia rānei e au tētahi uara p-pūtake z i te wāhi o tētahi pūtake t?
Ka whakamahia te uara pūtake z ina mōhiotia te whakarerenga paerewa o te iwi whānui, te tauira rānei he nui (tata ki te n ≥ 30). Mō ngā tauira iti me te whakarerenga paerewa e whakaarotia ana, ka hoatu e te tuaritanga t tētahi uara p tika ake.
He aha te rerekētanga i waenganui i te uara p me te taumata whai tikanga?
Ko te taumata hiratanga α he taumata e tautuhia ana e koe i mua, pēnei i te 0.05. Ka tātaitai te uara p mai i tō koe raraunga. Ka whakakāhoretia e koe te whakaaro kore ina tae te uara p ki raro iho i te α.
API — whakamahi tēnei tātaitai mai i te waehere
E kī ana tēnei tātaitai hei wāhi mutunga kore JSON - kāore he kī e hiahiatia ana. Ka tukuna ngā uara āpure i raro nei hei tohutoro pātai, JSON rānei. Ka pānui te papatono API katoa →
Whakamutunga
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);Ko ngā hua he whakataunga mō te tohutohu ahuwhānui anake, ehara i te tohutohu moni, rongoā, tāke rānei.