Coefficient ya kusintha Calculator
Kuyerekezera kusiyanasiyana kwa zinthu monga kusiyana kwa standard deviation ndi kusiyana kwa mfundo.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
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.
Mafunso ofunsidwa nthawi zambiri
Kodi ndi chiyani chosinthika cha kusintha?
Palibe universal cutoff, koma CV pansi pa za 15% nthawi zambiri amaonedwa pansi (konzekera) kusinthasintha ndi pamwamba 30% relatively high.Always kuganiza kuti ndi zotsutsana ndi maonekedwe mfundo za m'munda wanu.
Kodi nthawi yomweyo ndi coefficient ya kusintha si zothandiza?
CV si yodalirika pamene malire ndi pafupi ndi zero, chifukwa kugawa ndi malire aang'ono kumachititsa kuti iwonongeke, ndipo si yothandiza kwa deta ndi matanthauzo oipa kapena deta yomwe ilibe malire a zero, monga kutentha kwa Celsius.
Kodi ndingatani kuti ndiwerengere kuchuluka kwa kusintha?
Kugawa standard deviation ndi pakati ndi kuwonjezeka ndi 100 kuti anene izo monga peresenti. Kwa pakati 14 ndi standard deviation 3.16, CV ndi 3.16 ÷ 14 × 100% ≈ 22.6%.
N’chifukwa chiyani kugwiritsa ntchito CV m'malo mwa standard deviation?
Standard deviation ndi yogwirizana ndi mayunitsi ndi kutalika kwa deta, kotero inu simungathe moyenera kuyerekezera kufalitsa kwa mtengo mu madola ndi kufalitsa kwa mamita m'lifupi mu masentimita. Kugawa ndi kutalika kumachotsa mayunitsi, kulola inu kuyerekezera kugwirizana kwa m'madera onse osiyana deta.
Kodi coefficient ya kusintha ndi chimodzimodzi monga standard deviation?
Yes. Relative standard deviation (RSD) ndi dzina lina kwa coefficient ya kusintha anasonyeza ngati peresenti; mawu awiri ndi interchangeable.
Kodi ndiyenera kugwiritsa ntchito mzere kapena anthu standard deviation?
Kugwiritsa ntchito sample njira pamene mitengo yanu ndi subset anatchula kuchokera ku gulu lalikulu, ndi anthu njira pamene iwo ndi gulu lonse. Chosankha amasintha standard deviation pang'ono ndi chifukwa chake CV, makamaka kwa ma seti aang'ono deta.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
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);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.