Sample Size Calculator
Ita shuwa kuti ongororo yako inoratidza kuti bvunzo iri kuitwa nechinangwa chekubvisa matambudziko.
Zvinyorwa zvinogadziridzwa paunenge uchinyora.
Nezve iyi kalkulator
= z²·p(1 − p) / e², where z is the critical value for the confidence level, p the expected proportion and e the target margin of error as a decimal. This sample size calculator finds how many people you need to survey for a chosen margin of error and confidence level — the planning step before you run a poll or study. It uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level, p the expected proportion and e the target margin of error as a decimal. This sample size calculator finds how many people you need to survey for a chosen margin of error and confidence level — the planning step before you run a poll or study.Worked example:Worked example:Work
Zvimwe zvinobvunzwa zvakanyanya
Sei muenzaniso urefu waka kalkuled?
Chimwe chezvikonzero ndechekuti n = z²·p(1 − p) / e², apo z ndiyo fungidziro yehuwandu hwevanhu vakaongororwa, p ndiyo fungidziro yehuwandu hwevanhu vakaongororwa uye e ndiyo fungidziro yehuwandu hwevanhu vakaongororwa.
Chii chinonzi finite population correction?
Kana vanhu vako vadiki, iwe unofanira kukumbira zvichemo zvishoma kupfuura zvainotaura fomula yebasa. Kugadzirisa n = n₀ / (1 + (n₀ − 1)/N) kunodzikira mufananidzo kunzvimbo yevanhu N. Izvo zvinokosha zvikuru kana mufananidzo uri mufananidzo mukuru wemufananidzo wose.
Ndezvipi zvikonzero zvandinofanira kuisa 95% confidence level pavanhu vangu?
Izvi zvinobva pamariji ematambudziko aunogona kubvuma. Pa95% confidence nemariji ye5% uye pasina mariji apfuura, iwe unofanirwa kuve nevanhu 385 vanobvunza; mariji ye3% inofanirwa kunge iri 1,068 uye mariji ye1% inofanira kunge iri 9,604.
Nei huwandu hwemufananidzo hwaro hwasvibiswa?
Unogona kuongorora chikamu chemunhu, saka chero chidimbu chemhedzisiro chinorongedzwa kusvika kune chazvino chekumusoro. Kurongedzwa kumusoro kupfuura pasi kunopa chokwadi chekuti marongero ematambudziko haasi akakura kupfuura zvauri kutarisira.
Ndinofanira kuisa mashoko ehuwandu hwevanhu pasi pechivharo here?
Kuisa pazero (kana pasina) kana huwandu hwevanhu hwakakura kana hwasingazivikanwe, izvo zvinopa huwandu hwevanhu hwakafanana nehuwandu hwevanhu vasingaperi. Nzira yekuisa huwandu hwevanhu vakanaka ndeyekuti huwandu hwevanhu vakanaka hunofanira kunge huri hudiki zvakakwana kuti kugadzirisa kuite kuti huwandu hwevanhu huve hwakawanda.
Sei ndinogona kuderedza zvinodiwa sample size?
Kubvuma kuwedzera chiyero chekukanganwa, kushandisa yakaderera kuvimbika, kana kupa chikamu pamusoro 50% kana iwe une kuvimbika kufungidzira.Imwe neimwe yezvi zvinodzikira nhamba yezvipo formula zvinoda.
API — kushandisa iyi kalkulator kubva code
Chiva iyi calculator semahara JSON endpoint - hapana chikuru zvinodiwa. Kutumira nzvimbo zviwanikwa pasi separameter query kana JSON. Tora yakazara API docs →
Endpoint
GET https://calculator.free/api/v1/sample-size/curl
curl "https://calculator.free/api/v1/sample-size/?conf=1.96&e=5"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/sample-size/?" + new URLSearchParams({
"conf": "1.96",
"e": "5"
}));
const data = await r.json();
console.log(data.results);Zviratidzo zvemubvunzo ndezvekufungidzira kwechinangwa chekudzidzisa chete, kwete zvemari, zvehutano kana zvemari.