Ka'idojin Ƙididdiga na Asali
Kididdiga ita ce kimiyyar da ta shafi tattarawa, nazari, fassara, gabatarwa, da kuma tsara bayanai. Ana amfani da wannan fanni don sarrafa bayanai a fannoni daban-daban, tun daga kimiyya da kasuwanci zuwa kimiyyar lafiya da zamantakewa. Fahimtar ƙa'idodin ƙididdiga na asali yana da mahimmanci don yanke shawara bisa ga bayanai da bayanai masu inganci. Wannan labarin zai yi bita kan ƙa'idodi da yawa na ƙididdiga, gami da tattara bayanai, nau'ikan bayanai, aunawa da sarrafa bayanai, adadin ƙididdiga, da kuma ƙididdigar ƙididdiga.
Tattara bayanai
Mataki na farko a kididdiga shine tattara bayanai. Nau'in bayanan da muke samu ya dogara ne akan hanyar tattara bayanai da muke amfani da su. Ana iya raba tattara bayanai zuwa manyan nau'i biyu:
1. Bincike da Tambayoyi: Wannan hanyar ta ƙunshi samun bayanai daga wani takamaiman samfurin ta hanyar tambayoyi a rubuce ko na baki. Sau da yawa ana amfani da bincike a fannin zamantakewa, tallatawa, da kuma binciken lafiyar jama'a.
2. Gwaje-gwaje: A cikin gwaje-gwaje, masu bincike suna sarrafa abubuwa da yawa don nazarin tasirin wani aiki ko shiga tsakani. Ana amfani da gwaje-gwajen a cikin binciken kimiyya, musamman a fannonin kimiyya da magani.
Jenis Data
Ana iya rarraba bayanai bisa ga wasu halaye, ciki har da:
1. Bayanan Adadi: Bayanan da aka auna kuma aka bayyana su cikin lambobi. Wannan bayanan na iya zama daban (misali, adadin yara a cikin iyali) ko kuma ci gaba (misali, tsayin mutum).
2. Bayanan Inganci: Bayanan da aka bayyana a cikin nau'i na rukuni ko siffofi. Wannan bayanan na iya zama na asali (misali, jinsi: namiji ko mace) ko na tsari (misali, matakin gamsuwa: gamsuwa sosai, gamsuwa, tsaka tsaki, rashin gamsuwa, rashin gamsuwa sosai).
Aunawa da Sarrafa Bayanai
Domin yin nazarin bayanai, yana da muhimmanci a san ma'aunin auna bayanai. Akwai nau'ikan ma'aunin auna bayanai guda huɗu:
1. Sikelin Suna: Rukuni ba tare da tsari mai kyau ba. Misalai: jinsi, launin ido.
2. Sikelin Ordinal: Rukuni masu tsari bayyananne. Misali: matakin ilimi (makarantar firamare, makarantar sakandare, makarantar sakandare, jami'a).
3. Sikelin Tazara: Bayanan lambobi masu tazara daidai amma babu sifili cikakke. Misali: zafin jiki a digiri Celsius.
4. Ma'aunin Ratio: Bayanan lambobi tare da tazara daidai gwargwado da sifili cikakke. Misalai: nauyi, tsayi.
Sarrafa bayanai ya ƙunshi matakai da dama masu mahimmanci, kamar gyarawa, coding, da kuma jera bayanai. Gyara yana tabbatar da cewa bayanan da aka tattara ba su da kurakurai. Coding yana sanya lambobin lambobi ga bayanai na rukuni don sauƙaƙe sarrafawa. Jerin bayanai ya ƙunshi tsara bayanai cikin tebura don sauƙaƙe fassara da bincike.
Girman Ƙididdiga
Wasu ƙididdiga da ake amfani da su wajen nazarin bayanai sun haɗa da:
1. Ma'ana: Jimlar dukkan bayanai da aka raba da adadin maki na bayanai. Ma'ana tana ba da ra'ayi na gaba ɗaya game da "tsakiyar" bayanan.
2. Matsakaici: Matsakaicin ƙima wanda ke raba bayanan zuwa sassa biyu daidai. Ana amfani da matsakaicin don bayanai ko bayanai masu bambanci sosai tare da waɗanda ba su da alaƙa.
3. Yanayi: Ƙimar da ta fi bayyana a cikin saitin bayanai. Yanayi ya fi dacewa da bayanan rukuni.
4. Bambanci da Bambancin Daidaitacce: Yana auna nisan da bayanai suka bazu daga matsakaicin. Bambancin Daidaitacce shine tushen murabba'in bambancin kuma yana ba da alamar yadda bayanan suka bambanta.
5. Nisa, Tsakanin Range (IQR): Nisa shine bambanci tsakanin matsakaicin da mafi ƙarancin ƙima. IQR ma'auni ne na yaɗuwar bayanai wanda ke kallon matsakaicin kewayon (watau, tsakanin kwata na farko da na uku).
Ganin Bayanai
Gabatar da bayanai a siffar gani sau da yawa yana sauƙaƙa fahimta da yin nazari. Wasu dabarun hangen nesa na bayanai sun haɗa da:
1. Jadawalin Bar: Yana nuna bayanai na rukuni a matsayin sanduna tare da tsayi daidai da mita ko ƙimar bayanan.
2. Jadawalin Pie: Yana nuna rabon bayanan rukuni a matsayin 'guda' na da'ira.
3. Histogram: Yana nuna rarraba bayanai na adadi a cikin tazara maƙwabta.
4. Tsarin Akwati: Yana nuna rarraba bayanai ta hanyar mai da hankali kan matsakaicin, kwata, da kuma waɗanda ba su da alaƙa.
5. Tsarin Watsawa (Zane-zanen Watsawa): Yana nuna alaƙar da ke tsakanin ma'auni guda biyu masu ƙima.
Ƙididdigar Ƙididdiga
Ka'idar kididdiga ta ƙunshi amfani da samfurin bayanai don yin ƙarshe ko hasashe game da yawan jama'a. Manyan ɓangarorin biyu na ƙididdigar kididdiga sune:
1. Kiyasi: Tsarin ƙididdige kiyasin ma'aunin yawan jama'a bisa ga bayanan samfurin. An raba kiyasin zuwa kiyasin maki da kiyasin tazara.
2. Gwajin Hasashe: Tsarin gwada zato ko ikirarin game da ma'aunin yawan jama'a. Gwajin Hasashe ya ƙunshi ƙirƙirar hasashe marasa ma'ana da madadin, da kuma amfani da gwaje-gwajen ƙididdiga don tantance ko akwai isassun shaidu don ƙin yarda da hasashe marasa ma'ana.
Misali, idan muna son sanin ko matsakaicin lokacin barci ga ɗaliban jami'a shine awanni 7 a kowace dare, za mu iya ɗaukar samfurin ɗalibai bazuwar mu ƙididdige matsakaicin lokacin barcinsu. Dangane da wannan matsakaicin samfurin, za mu iya yin hasashen matsakaicin lokacin barci ga dukkan ɗaliban ta amfani da dabarun gwaji na kimantawa da hasashe.
Kammalawa
Kididdiga kayan aiki ne mai matuƙar muhimmanci a nazarin bayanai, yana taimaka mana mu fahimci abubuwan da suka faru masu sarkakiya da kuma yanke shawara bisa ga shaidu. Ta hanyar koyon ƙa'idodin ƙididdiga na asali, za mu iya zama mafi inganci wajen tattarawa, sarrafawa, da fassara bayanai. Kwarewar ra'ayoyi kamar tattara bayanai, nau'ikan bayanai, auna bayanai da sarrafawa, adadin ƙididdiga, da kuma ƙididdigar ƙididdiga yana ba mu damar fahimtar abubuwan da ke kewaye da mu ta hanyar da ta fi tsari da manufa.
A cikin duniyar da bayanai ke ƙara mamaye, ikon yin nazari da fassara bayanai bai taɓa zama mafi mahimmanci ba. Fara da muhimman abubuwa kuma haɓaka ƙwarewar ku ta ƙididdiga akan lokaci, domin wannan zai ba ku damar yanke shawara mafi kyau, ko a cikin yanayi na ƙwararru ko na kashin kai.
