I-Calculator ye-Variance

Bala isampuli okanye utshintsho lwendawo loluhlu lwedatha.

Utshintsho —

Ithambeka Elisezantsi —

Ixabiso eliphakathi —

I-sum ye-squared deviations —

Ubungakanani obuncinci —

Ubukhulu —

Igama le projekti —

Ibala —

Iinketho ze projekti

Malunga nale Calculator

standard deviation is the average of the squared deviations from the mean and is the square of the standard deviation. This calculator gives the sample variance (sum of squared deviations divided by n − 1) or the population variance (divided by n), along with the standard deviation, mean, range and sum of squared deviations. Variance is expressed in squared units, which is why it is usually easier to interpret. Variance is always non-negative and gives extra weight to values that lie far from the mean. The standard deviation is the average of the squared deviations from the mean and is the square of the standard deviation. This calculator gives the sample variance (sum of squared deviations divided by n − 1) or the population variance (divided by n), along with the standard deviation, mean, range and sum of squared deviations. This calculator gives the average of the squared deviations from the mean and is the square of the standard deviation.Worked example:To find it, take the mean, subtract it from every value, square each of those deviations, add them together and divide by n − 1 for a sample or by n for a whole population.Worked example:To find it, take the mean, subtract it from every value, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those deviations, square each of those devi

Imibuzo ebuza rhoqo

Utshintsho luqhagamshelana njani nokungalingani okuqhelekileyo?

Ixabiso eliqhelekileyo liyintloko yesikwere sexabiso eliguqukayo. Ixabiso eliguqukayo likwiyunithi eziskwayeriweyo (umzekelo, iidola eziskwayeriweyo), ngelixa ixabiso eliqhelekileyo libuyela kwiyunithi zokuqala, ngoko ke ezimbini zisoloko zichaza unikezelo olufanayo.

Ndisebenzisa njani i n versus n − 1?

Yahlula nge n - 1 xa i data yakho ibonisa umzekelo osetyenziswayo ukuqikelela uqoqosho olukhulu; yahlula nge n xa i data yakho ibonisa uqoqosho olupheleleyo olumkelayo.

Kutheni i-variance ikwiyunithi ezi-2?

Kuba utshintsho ngalunye lubekwa kwisikwere phambi kokulinganisa, impumelelo ithatha isikwere seyunithi yokuqala - iidola ezikwisikwere, isentimitha ezikwisikwere njalo njalo. Oku kwenza utshintsho lunzima ukuchaza ngokuthe ngqo, oko kubangela ukuba isiseko sayo esikwisikwere, utshintsho oluqhelekileyo, lunikezelwe ngaphaya kwayo.

Ingaba utshintsho luya kuba lu negative?

Ayinaku. Yiphakathi yamanani aphindwe kabini, ngoko ke iya kuba ngu zero okanye i positive. Utshintsho lomlinganiselo we zero ngokuchanekileyo kuthetha ukuba ixabiso ngalinye kumqolo lufana.

Yintoni utshintsho phakathi kwe-variance ne-standard deviation?

Zichaza unikezelo olufanayo kodwa kwiimlinganiselo ezahlukeneyo: uguquko luphakathi kokungalingani okuthe nkqo, nokungalingani okuthe nkqo kukungcambu okungenani, emva kwiyunithi yokuqala. Ukuba uguquko luyi-25, ukungabinani okuthe nkqo ku-5.

Isetyenziswa njani i-variance kuhlalutyo olunyanzelekileyo?

Utshintsho luyisiseko somngcipheko kwimali, amandla ophawu kwizobugcisa kunye novavanyo lwe-F kwi-ANOVA, apho utshintsho phakathi kwamaqela luthelekiswa notshintsho ngaphakathi kwabo ukugqiba ukuba ngaba amaqela athetha ukuba hlukile.

API — sebenzisa le calculator ukusuka kwikhowudi

Nceda le kalkulator njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo engezantsi njengeparameter yombuzo okanye i-JSON. Funda i-API epheleleyo →

Incopho yesiphelo

GET https://calculator.free/api/v1/variance/

curl

curl "https://calculator.free/api/v1/variance/?numbers=12, 15, 17, 20, 22, 25&type=sample"

JavaScript `fetch()`

const r = await fetch(
  "https://calculator.free/api/v1/variance/?" + new URLSearchParams({
    "numbers": "12, 15, 17, 20, 22, 25",
    "type": "sample"
  }));
const data = await r.json();
console.log(data.results);

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Incopho yesiphelo

curl

JavaScript fetch()

JavaScript `fetch()`