Kuwanda Kwenguva: Nzira Inokosha Yekuverenga Nhamba
Kuwanda kwezvinoitika (relative frequency) ipfungwa huru muhuwandu hwezviverengero inotsanangura kuti chiitiko chinoitika kangani mudata, zvichienderana nehuwandu hwese hwezvinoitika. Kunyange zvazvo izwi iri ringanzwika serinoshanda kana kuti rakasiyana, kunzwisisa kuwanda kwezvinoitika kwakakosha kune chero munhu ari kutsvaga ongororo yedata inoshanda uye ine musoro. Chinyorwa chino chichaongorora tsananguro, kuverenga, mashandisirwo, uye mienzaniso inoshanda yekuwanda kwezvinoitika (relative frequency) mumamiriro akasiyana-siyana.
Kunzwisisa Kuwanda Kwenguva
Kuwanda kwezviitiko (relative frequency) zvinoreva huwandu hwezviitiko zvinoitika pachiitiko chimwe chete zvichienderana nehuwandu hwezviitiko zviri mudata. Panyaya yemasvomhu, huwandu hwezviitiko (FR) hunogona kuratidzwa seizvi:
\[ FR = \frac{f}{N} \]
apo \( f \) iri kuwanda (nhamba) kwechiitiko chakati, uye \( N \) iri huwandu hwezviitiko zvose.
Nemamwe mashoko, relative frequency inhamba yechiitiko chakati mudataset. Relative frequency inogara iine kukosha kuri pakati pe0 ne1, apo 0 zvinoreva kuti chiitiko hachimboitiki, uye 1 zvinoreva kuti chiitiko chinoitika nguva dzose. Kana chashandurwa kuita percentage, relative frequency values inogona kunzwisisa zviri nyore.
Muenzaniso weKuverenga Kunowanzoenderana
Ngatifungei nezvemuenzaniso uri nyore. Ngatitii tine ruzivo rwemavara anodiwa nevanhu gumi vakabvunzwa kana vachida ruvara rutsvuku, bhuruu, kana girini. Zvakabuda muongororo iyi ndeizvi:
– Tsvuku: vanhu 3
– Bhuruu: vanhu vashanu
– Girini: vanhu 2
Huwandu hwevapinduri vese igumi. Kuti tiverenge huwandu hwevara, tinongopatsanura huwandu hwezvatinoda paruvara rumwe nerumwe nehuwandu hwevapinduri.
– Kuwanda kwezvitsvuku: \( \frac{3}{10} = 0.3 \) kana 30%
– Kuwanda kwebhuruu: \( \frac{5}{10} = 0.5 \) kana 50%
– Kuwanda kweruvara rwegirini: \( \frac{2}{10} = 0.2 \) kana 20%
Kubva pano, tinogona kuona kuti chikamu chikuru chevanhu vakaongororwa vanofarira ruvara rwebhuruu.
Kushandiswa kweFrequency Frequency
Kushandiswa kwehuwandu hunoshandiswa muzvikamu zvakasiyana-siyana, kubva pakutsvagisa kwesainzi kusvika pakuongorora mabhizinesi. Heano mimwe mienzaniso yemashandisirwo:
1. Nhamba Dzinotsanangura
Muzviverengero zvinotsanangura, mareferensi ehukama anoshandiswa kupa mufananidzo wakajeka uye nekukurumidza wekugoverwa kwedata. Semuenzaniso, pakuongorora mareferensi emhinduro kumibvunzo yeongororo, mareferensi ehukama anogona kuratidza maitiro ehuwandu kana maitiro chaiwo mudata.
2. Kudzora Hunhu
Muindasitiri yekugadzira, huwandu hwezvinhu hunowanzo shandiswa kuyera kuitika kwezvikanganiso muboka rezvigadzirwa. Semuenzaniso, kana boka riine zvinhu chiuru uye makumi mashanu zvisina kunaka, huwandu hwezvinhu zvisina kunaka ndi \( \frac{50}{1000} = 0.05 \) kana 5%. Ruzivo urwu rwakakosha pakuongorora nekuvandudza mhando yechigadzirwa.
3. Kupararira kwezvirwere
Muhutano hwevanhu, huwandu hunogona kushandiswa kuverenga kuwanda kana kuwanda kwechirwere muvanhu. Semuenzaniso, kana pavanhu 10.000 paine vanhu 200 vane chirwere chimwe chete, huwandu hunowanzoonekwa nechirwere ichocho ndi \( \frac{200}{10000} = 0.02 \) kana 2%.
4. Kusarudzwa kweFungidziro muKutsvagurudza
Mukutsvagisa kwesainzi, huwandu hwepfungwa hunogona kubatsira mukuyedza fungidziro. Semuenzaniso, mukuyedza kuyedza kana mushonga mutsva unoshanda kupfuura wekare, huwandu hwepfungwa hunobudirira mumapoka maviri hunogona kuenzaniswa kuti uone kukosha kwenhamba.
Kuwanda kweFrequency vs. Kuwanda kweFrequency
Kuwanda kwakakwana uye kuwanda kwehuwandu hwehuwandu zvinowanzo shandiswa pamwe chete kuti pave nekunzwisisa kwakakwana kwedata. Kuwanda kwakakwana kunoreva huwandu chaihwo hwezviitiko zvechiitiko, zvisinei nehuwandu hwezviitiko. Kuwanda kwakasiyana, kune rumwe rutivi, kunoreva kuenzanisa, zvichipa mamiriro anoshanda uye akakodzera, kunyanya kana uchishanda nedata rine saizi dzakasiyana dzemuenzaniso.
Semuenzaniso, ongororo mbiri dzingawana kuti vanhu zana vanoda chigadzirwa A uye vanhu makumi mashanu vanoda chigadzirwa B. Zvisinei, kana ongororo yekutanga iine vanhu mazana maviri vakapindura uye ongororo yechipiri iine vanhu zana vakapindura, huwandu hwezvinodiwa zvechigadzirwa A i50% uye zvechigadzirwa B i50%, zvichiratidza chiyero chakafanana kunyangwe nhamba dzakazara dzakasiyana.
Kuganhurirwa kweFrequency Frequency
Kunyange zvazvo huwandu hwemhinduro hune simba, hunewo miganhu. Nekuti huwandu hwemhinduro hunoenderana zvikuru nehukuru hwemuenzaniso, mhedzisiro inogona kunge yakarerekera kana kuti isina kuratidzwa zvakanaka kana muenzaniso wacho usina kukura zvakakwana kana kuti usina kusarudzwa zvisina tsarukano. Semuenzaniso, muongororo diki ine vanhu gumi chete vakapindura, shanduko diki muhuwandu hwevaya vakapindura vanosarudza sarudzo yakati inogona kuchinja zvakanyanya huwandu hwemhinduro.
Kududzira Kuwanda Kwenguva
Zvakakosha kunzwisisa mamiriro ezvinhu pakududzira mareferensi anoenderana. Semuenzaniso, kana chitoro chikashuma kuti 70% yevatengi vanoda chigadzirwa chakati, irworwo ruzivo rwakakosha. Zvisinei, tinofanira kunzwisisa huwandu hwese hwevatengi vakabvunzurudzwa uye kuti ongororo iyi yakaitwa sei kuti tione kururama uye kumiririrwa kwedata.
Pamusoro pezvo, mukutsvagisa kwesainzi kana ongororo yakadzama yedata, vaongorori vanowanzo shandisawo nguva dzekuvimba uye bvunzo dzekufungidzira kuti vaone kana mutsauko uripo muhuwandu hwema frequency wakakosha muhuwandu kana kuti kungori mhedzisiro yekusiyana kwemuenzaniso.
Mhedziso
Kuwanda kwehuwandu hwe ...
Saka, kunzwisisa nehunyanzvi mukuverenga nekududzira mareferensi ehukama chimwe chezvinhu zvinokosha pakuva mushandisi wedata akangwara, anoongorora, uye anoongorora.
