Samaynta
Ka hel tirada tijaabada baaritaanka ee xagal u ah in la gaaro xagal ah khaladaadka.
Natiijooyinka cusbooneysiinta sida aad ku qorto.
Ku saabsan Kalkaaliyahan
= 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. The sample size calculator 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. The sample size calculator 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. The sample size calculator 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. The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.Worked example:The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level.The sample size calculator uses the standard formula n = z²·p(1 − p) / e², where z is the critical value for the confidence level
Su'aalaha badanaa la isweydiiyo
Sidee waa miisaanka tusaale ah la xisaabiyey?
Foomka salka waa n = z² · p (1 − p) / e², halkaas oo z waa kalsoonida qiimaha muhiimka ah, p qaybta la filayo iyo e xagalka qalad sida decimal. Natiijadu waa la wareegay sababtoo ah ma aad u soo uruurin kartaa qayb ka mid ah qof.
Waa maxay saxnaanta tirada dadku ku dhammaato?
Marka dadku yar yahay, waxaad u baahan tahay jawaabo ka yar sida foomka salka soo jeedinaya. The hagaajinta n = n₀ / (1 + (n₀ − 1)/N) hoos u tusaale u ah tirada dadka N. Waa muhiim marka tusaale waa qayb weyn oo dhan.
Tirada dadka ma waxaan u baahanahay 95% heerka kalsoonida?
Waxay ku xiran tahay xaddidaadda qaladka aad aqbali kartaa. At 95% kalsooni la 5% xaddidan iyo wax qiimeyn hore ah oo aad u baahan tahay oo ku saabsan 385 jawaabayaal; 3% xaddidan u baahan yahay oo ku saabsan 1,068 iyo 1% xaddidan oo ku saabsan 9,604.
Maxaa sababta oo ah miisaanka tusaale ah oo la wareegay?
Waxaad ka qayb qaadan kartaa cilmi baadhis qof, sidaas darteed wax kasta oo natiijo qaybo ah waa la wareegay ilaa tirada buuxda ee soo socda. wareegaya kor si ka duwan hoos u xaqiijinaya in xaddiga qaladka ma aha mid ka weyn oo aad u baahan tahay.
Ma waxaan ka tagtaa tirada dadka oo aan buuxin?
Ka tag sixirka (ama buuq) marka dadka waa aad u weyn ama aan la aqoon, taas oo siineysa standard "dadka aan xad lahayn" oo ah miisaanka tusaale ah. Ku soo gasho dad badan oo dhab ah oo kaliya marka ay tahay si aad u yar oo ay saxnaanta macno ahaan hoos u tusaale.
Sidee baan u yareyn karaa miisaanka tusaale loo baahan yahay?
Aqoonso xagal weyn oo qalad ah, isticmaalka heerka kalsoonida hooseeya, ama qayb ka sii ka 50% haddii aad leedahay qiimeyn ku kalsoonaan karo. mid kasta oo ka mid ah kuwaas oo hoos u dhigi tirada jawaabaha formula dalbaday.
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/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);Natiijooyinka waa tirakoobka loogu talagalay tilmaamaha guud oo keliya, maaha dhaqaale, caafimaad ama talo bixin canshuur.