Kalkulatè Kowòdinasyon
Kalkile r Pearson ant de lis nimewo.
Rezilta yo mete ajou pandan w ap ekri.
Atik sa a
Pearson’s correlation coefficient (r) is a measure of the strength and direction of the linear relationship between two variables, ranging from −1 (perfect negative) through 0 (no linear relationship) to +1 (perfect positive). It is found by dividing the covariance of x and y by the product of their standard deviations, which standardizes the result into that fixed −1 to +1 range. It needs at least two pairs, and the result is undefined if either variable never changes. It needs at least two pairs, and the result is undefined if either variable never changes. It needs at least two pairs, and the result is plotted with its best-fit line. Worked example: for x = 1, 2, 3, 4, 5 and y = 2, 4, 5, 4, 6 the points trend upward together, giving r ≈ 0.85 — a strong positive correlation — and r² ≈ 0.73, meaning about 73% of the variation in y.Worked example: for x = 1, 2, 3, 4, 5 and y = 2, 4, 5, 4, 6 the points trend upward together, giving r ≈ 0.85 — a strong positive correlation — and r² ≈ 0.73, meaning about 73% of the variation in y.Worked example: for x = 1, 2, 3, 4, 5 and y = 2, 4, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41,
Kesyon ki poze souvan
Ki sa koefisyan korelasyon an di m?
Li mezire kijan de varyab deplase ansanm sou yon liy dwat. Valè ki pre +1 oswa - 1 endike yon relasyon liniyè fò, pandan ke valè ki pre 0 vle di pa gen okenn oswa ti asosyasyon liniyè. Senk la montre direksyon relasyon an.
Èske korelasyon vle di causalité?
Non. Yon korelasyon wo montre de varyab deplase ansanm men pa ke yon ki lakòz lòt la. Yon twazyèm faktè ki kache, oswa konbinezon pur ka kreye yon korelasyon fò san okenn lyen causal.
Ki sa ki R²?
R² se kare koefisyan korelasyon an. Li se proporsyon varyasyon an nan y ki eksprime pa yon relasyon liniyè ak x - yon r de 0.8 bay yon R² de 0.64, sa vle di 64% nan varyasyon an se kontwole.
Ki sa ki konsidere kòm yon korelasyon fò?
Kòm yon gid, yon r absoli anba 0.3 se fèb, ant 0.3 ak 0.5 modere, ant 0.5 ak 0.7 modere-a-fò ak pi wo pase 0.7 fò. Kalkulatè sa a bay ou yon lis fòs, men limit ki rezonab yo varye selon domèn.
Ki sa ki korelasyon negatif vle di?
Yon r negatif vle di ke varyab yo deplase nan direksyon opoze: kòm youn monte lòt la gen tandans pou tonbe. Yon r nan -0.9 se menm jan ak yon relasyon linivè fò tankou +0.9, sèlman inverted nan direksyon.
Ki diferans ki genyen ant korelasyon ak kovarians?
Kovarians mezire kijan de varyab varye ansanm men gwosè li depann de unite yo, se konsa li difisil pou konprann. r Pearson se kovarians divize pa de deviations estanda, ki rescales li nan yon unite-gratis -1 a +1.
Ki jan li se liy regression ki gen rapò ak korelasyon an?
Liy regression minimòm- kare se liy dwat ki pi byen sanble ak pwen yo, ak gradiyan li pataje senbòl li ak r. Korelasyon an di ou kijan pwen yo ap kenbe liy lan, pandan r² bay pati varyasyon li bay.
API — itilize sa a calculateur soti nan kòd
Apèl sa a calculateur kòm yon gratis JSON pwent-de-fini - pa gen okenn kle ki nesesè. Envoye valè jaden anba a kòm paramèt kesyonè oswa JSON. Li dokiman API a an antye →
Endpoint
GET https://calculator.free/api/v1/correlation-coefficient/curl
curl "https://calculator.free/api/v1/correlation-coefficient/?x=1, 2, 3, 4, 5&y=2, 4, 5, 4, 6"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/correlation-coefficient/?" + new URLSearchParams({
"x": "1, 2, 3, 4, 5",
"y": "2, 4, 5, 4, 6"
}));
const data = await r.json();
console.log(data.results);Rezilta yo se estimasyon pou kòmandman jeneral sèlman, pa finansye, medikal oswa konsèy taks.