Margin of khaladaadka Calculator
Ka hel xadka khaladaadka ah qaybta cilmi baarista.
Natiijooyinka cusbooneysiinta sida aad ku qorto.
Ku saabsan Kalkaaliyahan
a percentage it is z*·√(p(1 − p) / n), where p is the sample proportion, n the sample size and z* the critical value for your confidence level (1.96 for 95%). The default 50% proportion gives the most conservative (largest) margin, because the quantity p(1 − p) peaks at p = 0.5, which is why pollsters often quote it. To halve that margin you would need roughly four times the sample. To halve that margin you would need roughly four times the sample. The default 50% proportion gives the most conservative margin, because the quantity p(1 − p) peaks at p = 0.5, which is why pollsters often quote it. The default 50% proportion gives the most conservative margin.Worked
Su'aalaha badanaa la isweydiiyo
Maxaa yeelay, tusaale weyn hoos u marxalada qaladka?
The xagal yaryar la jilicsan yahay ee aasaaska square ee miisaanka tusaale, sidaas afar jeer n kala badh xagalka qalad. this soo noqnoqoshada yar ayaa sababta oo ah tusaalooyinka aad u weyn oo loo baahan yahay in ay u dhaqaajiyaan xagalka hoos mid ama laba dhibcood boqolkiiba.
Maxaa 50% ah qaybta default?
Qiimaha p (1 - p) waa ugu weyn ee p = 0.5, sidaas darteed la yaab leh 50/50 kala qaybsan soo saaro ugu ballaaran, ugu badan ee xaddidaadda conservative ee khaladaadka.
Sideen u xisaabiyaa xaddiga khaladaadka?
Ku baddal qiimaha muhiimka ah z * heerka kalsoonidaada by square root of p (1 − p) ÷ n. For p = 0.5, n = 1000 iyo 95% kalsoonida, taas oo ah 1.96 × √ (0.25 ÷ 1000) ≈ 3.1 boqolkiiba dhibcood.
Maxaa ka duwan yahay u dhexeeya xaddiga qalad iyo kala fogaanshaha kalsoonida?
Xaddidaadda qaladka waa badh-dhexroor; xaddidaadda kalsoonida waa heerka buuxa aad ka hesho by in la kordhiyo iyo in la yareeyo xaddidaadda ka natiijooyinkaada. A 48% natiijooyinka la xaddidaadda 3-point siiyaa xaddidaadda kalsoonida ee 45% ilaa 51%.
Ma dad badan oo ka badan u baahan tahay xagal ka weyn oo qalad ah?
No. Ka dib qaar ka mid ah kun oo qof oo tirada dadka yar yar saamayn ku leh xaddidaadda - waxa muhiimka ah waa xaddiga tusaale ah. Taasi waa sababta codbixinta qaranka iyo codbixinta magaalada ay ku wadaagaan xaddidaadda la mid ah oo la mid ah tirada dadka jawaabay.
Sidee ayuu heerka kalsoonida u beddeli karaa xaddiga khaladaadka?
A heerka kalsoonida sare u isticmaalaa z weyn *, taas oo ballaadhisa xaddidaadda. Ka dhaqaaqa 95% (z * = 1.96) ilaa 99% (z * = 2.576) kordhisa xaddidaadda by ku saabsan 31% ee tusaale la mid ah.
API — isticmaal xisaabinta ka code
Wici xisaabinta sida free JSON endpoint - key ma loo baahan yahay. Dib u soo dir qiimaha goobta hoos ku qoran sida parameters su'aal ama JSON. Akhri dhammaan API xuquuqda →
Xarafka
GET https://calculator.free/api/v1/margin-of-error/curl
curl "https://calculator.free/api/v1/margin-of-error/?n=1000&p=50&conf=1.96"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/margin-of-error/?" + new URLSearchParams({
"n": "1000",
"p": "50",
"conf": "1.96"
}));
const data = await r.json();
console.log(data.results);Natiijooyinka waa tirakoobka loogu talagalay tilmaamaha guud oo keliya, maaha dhaqaale, caafimaad ama talo bixin canshuur.