The malumikizanidwe koyefishienti - khalidwe malumikizanidwe lachitsanzo

Malumikizanidwe chitsanzo (cm) - pulogalamu mawerengedwe amene amapereka phwando la aone kuti pali masamu, imene chizindikiro zipatso quantified malingana zizindikiro umodzi kapena kuposerapo.

yx = ao + a1h1

kumene: Y - zizindikiro ntchito, malingana × Chinthu;

× - chizindikiro Chinthu;

A1 - chizindikiro Km, kusonyeza kusintha kotani mu chizindikiro zipatso pamene kusintha chinthu × ndi chimodzi, ngati zinthu zina zonse zokhudza Y kukhala zikutsatiridwa;

AO masentimita chizindikiro chimene chimasonyeza mmene zinthu zina zonse pa index bwino Y, ena kuposa chinthu variable ×

Posankha zizindikiro ogwira ndi zitsanzo chinthu ayenera kuganizira mfundo yakuti zizindikiro ntchito mu unyolo wa causality waima pa mlingo wopitirira ntchito chinthu.

NKHANI malumikizanidwe lachitsanzo

Pambuyo kuwerengetsa, ufotokoze mwapadera chitsanzo magawo masamu malumikizanidwe koyefishienti.

tsa - losavuta malumikizanidwe koyefishienti, -1 ≤ r Mukhoza ≤ 1, izo zikusonyeza mphamvu ndi malangizo chizindikiro pa zimakhudza chinthu zigoli. The kwambiri 1, mphamvu za ubale, kwambiri 0, ubwenzi wathu ndi yochepa. Ngati malumikizanidwe koyefishienti ndi HIV, ndiye kugwirizana ndi molunjika, ngati zoipa - anyamata.

The malumikizanidwe koyefishienti chilinganizo: pxy = (x-× * 1 / Y) / * EU ee

ee = hh2- (x) 2; EU = y2 (Y) 2

Ngati masentimita liniya multifactorial, ndi mawonekedwe:

yx = ao + a1h1 a2x2 + + ... + anx

ndiye izo masamu angapo malumikizanidwe koyefishienti.

0 ≤ P ≤ 1, ndipo ikusonyeza mphamvu zotsatira za onse anatengedwa pamodzi zizindikiro chinthu zigoli.

P = 1- ((yi-yi) 2 / (yi -usr) 2)

Kodi: u - zipatso chizindikiro - masamu phindu;

yi - phindu lenileni;

usr- phindu lenileni pafupifupi.

Woikidwiratu yi akamagwira m'malo ndi malumikizanidwe chitsanzo m'malo x1, x2 etc. makhalidwe awo enieni.

Pakuti zitsanzo univariate ndi multivariate osalunjika malumikizanidwe chiŵerengero kuchita masamu:

-1 ≤ mamita ≤ 1;

0 ≤ mamita ≤ 1

Akukhulupirira kuti ubwenzi bwino ndipo m'gulu chitsanzo cha zizindikiro factorial ofooka, ngati zikayamba wa lumikiza koyefishienti (m) mu uthunthu 0-0.3; ngati 0.3-0.7 - Kugwirizana kwa - pafupifupi; 0.7-1 pamwamba - likhale lolimba.

Popeza malumikizanidwe koyefishienti (nthunzi) r Mukhoza, ndi malumikizanidwe koyefishienti (angapo) R, malumikizanidwe chiŵerengero mamita - mtengo Mwina, amene masamu kwa koefishienti tanthauzo awo (chimafotokozera matebulo). Ngati koefishienti izi ndi zoposa phindu tebulo, ndi ubwenzi wa koefishienti kugwirizana ndi zomwe zimayambitsa n'kofunika. Ngati essentiality zikayamba lumikiza koefishienti kakang'ono kuposa mfundo tebulo kapena ngati kudzikonda lumikiza koyefishienti ndi zosakwana 0,7, chitsanzo sakhala ndi magawo onse factorial kuti kwambiri bwanji chifukwa.

The koyefishienti wa mtima umaonetsa kuchuluka chinthu m'gulu la magawo chitsanzo kudziwa mapangidwe chotsatira.

D = P2 * 100%

D = p2 * 100%

D = mamita 2 * 100%

Ngati koyefishienti wa mtima ndi wamkulu kuposa 50, ndiye chitsanzo mokwanira limafotokoza zimene zimachitika pansi kuphunzira, ngati zosakwana 50, m'pofunika kuti abwerere ku gawo loyamba la zomangamanga, ndi kubwereza zizindikiro kusankha chinthu kuti mupezeke chitsanzo.

Fisher Fisher chinthu kapena muyezo amadziwika Mwachangu chitsanzo wonse. Ngati chiŵerengero masamu ndi wamkulu kuposa tebulo, chitsanzo anamanga ndi yabwino yoganizira komanso zizindikiro za kulera kwa kuthetsa m'tsogolo. Ziri tebulo mtengo = 1.5. Ngati mtengo masamu ndi zosakwana tebulo, choyamba tiyenera kumanga chitsanzo, kuphatikizapo mfundo zofunika kulimbikitsa zotsatira. Kuwonjezera pa dzuwa la chitsanzo chonse kuti kwambiri bwanji lililonse koyefishienti mgwirizano. Ngati masamu mtengo wa chiŵerengero izi kuposa tebulo ukulu, ndi mgwirizano koyefishienti N'zochititsa chidwi ngati zochepa, ndiye chinthu chizindikiro, zimene koyefishienti Calculated ndi kuchotsedwa kuwerengetsera chitsanzo kuyamba kachiwiri, koma popanda chinthu ichi.