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Pulogalamu: Survey Minimum Sample Size Calculator

Survey Minimum Sample Size Calculator

Survey Minimum Sample Size Calculator

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Yambirani

Kupanga kafukufuku ndikuwonetsetsa kuti muli ndi mayankho oyenera omwe mungakhazikitse zisankho zabizinesi yanu kumafuna ukadaulo wambiri. Choyamba, muyenera kuwonetsetsa kuti mafunso anu akufunsidwa m'njira yosakondera. Chachiwiri, muyenera kuwonetsetsa kuti mukufufuza anthu okwanira kuti mupeze zotsatira zovomerezeka.

Simufunikanso kufunsa munthu aliyense, izi zitha kukhala zovutirapo komanso zodula. Makampani ofufuza zamsika amagwira ntchito kuti akhale ndi chidaliro chambiri, ndi zolakwika zochepa pomwe akufikira kuchuluka kwa olandila kofunika. Izi zimadziwika kuti zanu kukula kwachitsanzo. Ndinu zitsanzo gawo lina la anthu onse kuti apeze zotsatira zomwe zimapereka mulingo wa chidaliro kutsimikizira zotsatira. Pogwiritsa ntchito njira yovomerezeka kwambiri, mutha kudziwa kuti ndi yolondola kukula kwachitsanzo zomwe ziziimira anthu onse.

Ngati mukuwerenga izi kudzera pa RSS kapena imelo, dinani patsamba lanu kuti mugwiritse ntchito chida ichi:

Sungani Zitsanzo Zanu Zakufufuza

Kodi Zitsanzo Zitsanzo Zitsanzo Zimagwira Bwanji?

Sampling ndi njira yosankha kagulu kakang'ono ka anthu kuchokera pagulu lalikulu kuti apange malingaliro okhudza mikhalidwe ya anthu onse. Nthawi zambiri amagwiritsidwa ntchito pofufuza kafukufuku ndi zisankho kuti asonkhanitse deta ndikulosera za anthu.

Njira zingapo zoyeserera zitha kugwiritsidwa ntchito, kuphatikiza:

  1. Zitsanzo zosavuta zachisawawa: Izi zimaphatikizapo kusankha chitsanzo kuchokera kwa anthu pogwiritsa ntchito njira yachisawawa, monga kusankha mwachisawawa mayina pamndandanda kapena kugwiritsa ntchito jenereta wa manambala mwachisawawa. Izi zimawonetsetsa kuti membala aliyense wa anthu ali ndi mwayi wofanana wosankhidwa kukhala chitsanzo.
  2. Stratified zitsanzo Zimakhudzanso kugawa anthu m'magulu ang'onoang'ono (strata) kutengera mikhalidwe ina yake ndiyeno kusankha zitsanzo mwachisawawa pagulu lililonse. Izi zimatsimikizira kuti chitsanzocho chikuyimira magulu ang'onoang'ono osiyanasiyana pakati pa anthu.
  3. Zitsanzo za Cluster: Izi zikuphatikizapo kugawa anthu m'magulu ang'onoang'ono (magulu) ndikusankha zitsanzo mwachisawawa zamaguluwo. Mamembala onse amagulu osankhidwa akuphatikizidwa mu chitsanzo.
  4. Zitsanzo mwadongosolo: Izi zikuphatikizapo kusankha munthu aliyense pa chiwerengero cha anthu kuti azitsatira, pomwe n ndi nthawi yochitira zitsanzo. Mwachitsanzo, ngati nthawi yowerengera ndi 10 ndipo kuchuluka kwa anthu ndi 100, membala 10 aliyense angasankhidwe kuti achite.

Ndikofunikira kusankha njira yoyenera yochitira zitsanzo potengera momwe chiwerengero cha anthu chilili komanso funso la kafukufuku lomwe likuphunziridwa.

Mulingo wa Chidaliro motsutsana ndi Error Margin

Mu chitsanzo cha kafukufuku, a chidaliro amayesa chidaliro chanu kuti chitsanzo chanu chikuyimira anthu molondola. Zimafotokozedwa ngati peresenti ndipo zimatsimikiziridwa ndi kukula kwa chitsanzo chanu ndi mlingo wa kusiyana kwa chiwerengero chanu. Mwachitsanzo, chikhulupiliro cha 95% chimatanthauza kuti ngati mutachita kafukufuku kangapo, zotsatira zake zingakhale zolondola 95% ya nthawiyo.

The malire olakwika, kumbali ina, ndi muyeso wa kuchuluka kwa zotsatira za kafukufuku wanu zingasiyane ndi chiwerengero chenicheni cha anthu. Imawonetsedwa ngati kuchuluka ndipo imatsimikiziridwa ndi kukula kwa zitsanzo zanu komanso kuchuluka kwa kusiyanasiyana kwa anthu anu. Mwachitsanzo, tiyerekeze kuti malire olakwika pa kafukufuku ndi kuphatikiza kapena kuchotsera 3%. Zikatero, ngati mutapanga kafukufukuyu kangapo, chiwerengero chenicheni cha anthu chikhoza kugwera mkati mwa nthawi yodalirika (yotanthauzidwa ndi chitsanzo kutanthauza kuphatikiza kapena kuchotsa malire olakwika) 95% ya nthawiyo.

Chifukwa chake, mwachidule, kuchuluka kwa chidaliro ndikuwonetsa kuti mumadzidalira bwanji kuti chitsanzo chanu chikuyimira anthu. Nthawi yomweyo, malire olakwika amayesa kuchuluka kwa zotsatira za kafukufuku wanu zomwe zingasiyane ndi kuchuluka kwenikweni kwa anthu.

N'chifukwa Chiyani Kupatuka Kwambiri Ndikofunikira?

Kupatuka kokhazikika kumayesa kubalalitsidwa kapena kufalikira kwa gulu la data. Imakuwuzani kuchuluka kwa milingo yomwe ili mu dataset imasiyanirana ndi tanthauzo la dataset. Powerengera zachitsanzo chaching'ono cha kafukufuku, kupatuka koyenera ndikofunikira chifukwa kumakuthandizani kudziwa kulondola komwe mukufunikira pachitsanzo chanu.

Ngati kupatuka kwapang'onopang'ono kuli kochepa, ziwerengero za anthu zimakhala pafupi ndi zomwe zikutanthawuza, kotero simudzasowa kukula kwakukulu kuti mumvetse bwino tanthauzo. Kumbali ina, ngati kupatuka kokhazikika kuli kwakukulu, zikhalidwe za anthu zimabalalika kwambiri, kotero mudzafunika kukula kwachitsanzo chokulirapo kuti muwerenge bwino tanthauzo.

Nthawi zambiri, kupatuka kokulirapo, ndikokulitsa kukula kwachitsanzo komwe mungafunikire kuti mukwaniritse mulingo wolondola. Izi zili choncho chifukwa kupatuka kwakukulu kumasonyeza kuti chiwerengero cha anthu chikusinthasintha, kotero mufunika chitsanzo chokulirapo kuti muyese molondola tanthauzo la chiwerengero cha anthu.

Fomula Yotsimikizira Kukula Kwachitsanzo

Njira yodziwira kukula kwachitsanzo chofunikira kwa anthu omwe apatsidwa ndi motere:

S = \ frac {\ frac {z ^ 2 \ times p \ kumanzere (1-p \ kumanja)} {e ^ 2}} {1+ \ kumanzere (\ frac {z ^ 2 \ times p \ kumanzere (1- p \ kumanja)} {e ^ 2N} \ kumanja)}

Kumene:

  • S = Kukula kocheperako koyenera kuti mufufuze malinga ndi zomwe mwalandira.
  • N = Chiwerengero chonse cha anthu. Uku ndi kukula kwa gawo kapena kuchuluka kwa anthu omwe mukufuna kuwunika.
  • e = Malire Olakwika. Mukayesa kuchuluka kwa anthu, padzakhala malire a zolakwika.
  • z = Mungakhale otsimikiza bwanji kuti anthu angasankhe yankho mumtundu wina. Peresenti yodalirika imatanthawuza ku z-score, kuchuluka kwa zopatuka zomwe gawo linaperekedwa kuli kutali ndi tanthauzo.
  • p = Kupatuka kokhazikika (pamenepa ndi 0.5%)

Douglas Karr

Douglas Karr ndi CMO OpenINSIGHTS ndi woyambitsa wa Martech Zone. Douglas wathandizira oyambitsa ambiri opambana a MarTech, wathandizira kulimbikira kopitilira $ 5 bil pakugula ndi kuyika kwa Martech, ndipo akupitiliza kuthandiza makampani kukhazikitsa ndikusintha njira zawo zogulitsa ndi zotsatsa. Douglas ndi katswiri wodziwika padziko lonse lapansi wosinthira digito komanso katswiri komanso wokamba nkhani wa MarTech. Douglas ndi mlembi wofalitsidwa wa kalozera wa Dummie komanso buku la utsogoleri wabizinesi.

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