I-Coefficient ye-Variation Calculator
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The coefficient of variation (CV) expresses the standard deviation as a percentage of the mean, giving a unit-free measure of relative spread. Because it is scale-independent, the CV lets you compare the variability of data sets that have very different means or units — you can put the consistency of a set of body weights next to a set of exam scores even though they share no units.
The formula is simply CV = (standard deviation ÷ mean) × 100%. This calculator uses the sample or population standard deviation you choose, divides it by the mean of the data and flags whether the relative variability is low, moderate or high (below about 15%, between 15% and 30%, or above 30% here).
Worked example: for 10, 12, 14, 16, 18 the mean is 14 and the sample standard deviation is about 3.16, so the coefficient of variation is 3.16 ÷ 14 × 100% ≈ 22.6% — moderate relative variability. The CV is widely used in finance to compare investment risk per unit of return and in the lab to judge the precision of repeated measurements.
Imibuzo ebuza rhoqo
Yintoni i-coefficient ephezulu yotshintsho?
Akukho sinqumo esipheleleyo, kodwa i CV engaphantsi kwe 15% ihlala ithathwa njengencinane (ihlala ihambelana) uguquko kwaye ngaphezulu kwe 30% iphezulu kakhulu. Soloko uyivavanya ngokuchasene namaxabiso aqhelekileyo endawo yakho.
Xa i-coefficient ye-variation ayisebenzi?
I CV ayithembeki xa umndilili ufutshane nomda, kuba ukuwahlula ngendawo ephakathi encinci yenza ukuba iqhume, kwaye ayithethi ukuba i data eneexabiso ezibi okanye i data engekhoyo ibonakale njengendawo yomda, njengokuba kubushushu kwi Celsius.
Ndiyibala njani i-coefficient ye-variation?
Yahlula i-standard deviation nge-mean kwaye uyiphindaphindwe nge-100 ukuze uyicacise njengepesenti. Ukuba i-mean i-14 kwaye i-standard deviation i-3.16, i-CV yi-3.16 ÷ 14 × 100% ≈ 22.6%.
Kutheni usebenzisa iCV endaweni yokuchaphazela okuqhelekileyo?
Utshintsho oluqhelekileyo luyilelwe iiyunithi nenani le data, ngoko awunakuthelekiswa ngokuchanekileyo unikezelo lwexabiso kwidola kunye nonikezelo lomphakamo kwisentimitha. Ukwahlula ngephakathi kususa iiyunithi, ukuvumela uthelekiso lokulingana phakathi kweeseti ze data ezihlukileyo ngokupheleleyo.
Ingaba i-coefficient ye-variation ifana ne-relative standard deviation?
Ewe. Ukuchasana okuqhelekileyo okuhambelanayo (RSD) lilinye igama le-coefficient ye-variation ebonakaliswe njengepesenti; ezi zinto zimbini zitshintshwa.
Ngaba kufuneka ndisebenzise umzekelo okanye ukuguquka okuqhelekileyo koqoqosho?
Sebenzisa ukhetho lomzekelo xa amanani akho ayinkwenkwezi encinci esuka kwiqela elikhulu, nokhetho loqoqosho xa ziiqela ezipheleleyo. Ukhetho lutshintsha uguqulelo olusezantsi oluncinci kwaye ngoko i CV, ngakumbi kwiqela elincinci le data.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
GET https://calculator.free/api/v1/coefficient-of-variation/curl
curl "https://calculator.free/api/v1/coefficient-of-variation/?numbers=10, 12, 14, 16, 18&type=sample"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/coefficient-of-variation/?" + new URLSearchParams({
"numbers": "10, 12, 14, 16, 18",
"type": "sample"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.