Ungabala kanjani isikolo esingu-Z ku-Google AmaSpredishithi

Sawubona Tecnobits! Kwenzenjani? Ngithemba nibe nosuku oluhle. Nokho, bewazi ukuthi ungakwazi ukubala isikolo esingu-Z ku-Google AmaSpredishithi? Kulula kakhulu, kufanele nje ubeke Ungabala kanjani isikolo esingu-Z ku-Google AmaSpredishithi isibindi futhi yenziwe! Sanibonani!

1. Siyini isikolo sika-Z ku-Google AmaSpredishithi?

Isikolo sika-Z ku-Google AmaSpredishithi isilinganiso sezibalo esibonisa ukuthi kungakanani ukuchezuka okujwayelekile kwephoyinti ledatha elithile lingaphezulu noma ngaphansi kwencazelo yesethi yedatha. Kuyindlela yokujwayela nokuqhathanisa idatha ezikalini noma amayunithi ahlukene.

2. Kungani kubalulekile ukubala i-Z-score ku-Google AmaSpredishithi?

Ukubala isikolo esingu-Z ku-Google AmaSpredishithi kubalulekile ngoba kukuvumela ukuthi uqhathanise amanani esikalini noma amayunithi ahlukene, uhlonze abangaphandle, futhi uqonde ukusatshalaliswa nokuhlukahluka kwedatha esethiwe ngokunembe kakhudlwana.

3. Ungabala kanjani isikolo esingu-Z ku-Google AmaSpredishithi ukuze uthole isethi yedatha?

Ukuze ubale isikolo esingu-Z ku-Google AmaSpredishithi ukuze uthole isethi yedatha, landela lezi zinyathelo:

1. Faka idatha yakho kusipredishithi ku-Google AmaSpredishithi.
2. Bala incazelo yedatha yakho usebenzisa ifomula =AVERAGE(ububanzi bedatha).
3. Bala ukuchezuka okujwayelekile kwedatha yakho usebenzisa ifomula =STDEV(ububanzi bedatha).
4. Susa incazelo enanini ngalinye kudatha yakho bese uhlukanisa umphumela ngokuchezuka okujwayelekile. Lokhu kuzokunikeza isikolo esingu-Z sedatha ngayinye.

4. Usihumusha kanjani isikolo sika-Z ku-Google AmaSpredishithi?

Ukutolika isikolo esingu-Z ku-Google AmaSpredishithi kubalulekile ukuze uqonde incazelo yamanani. I-Z-score ephozithivu ibonisa ukuthi idatha ingaphezu kwesilinganiso, kuyilapho u-Z-score ongemuhle ubonisa ukuthi idatha ingaphansi kwencazelo. Uma liphakama inani eliphelele lomphumela we-Z, idatha isuka kuncazelo.

5. Isikolo sika-Z sisetshenziselwani ku-Google AmaSpredishithi?

Isikolo sika-Z ku-Google AmaSpredishithi sisetshenziselwa ukuqhathanisa idatha ezikalini ezihlukene noma amayunithi, ukuhlonza abangaphandle, nokuqonda ukuhlukahluka nokusatshalaliswa kwedatha esethiwe ngokunembe kakhudlwana. Kuyithuluzi eliyisisekelo ekuhlaziyeni izibalo nasekuthatheni izinqumo okusekelwe kudatha.

6. Ithini ifomula yokubala isikolo esingu-Z ku-Google AmaSpredishithi?

Ifomula yokubala isikolo esingu-Z ku-Google AmaSpredishithi limi kanje:

Z = (X – μ) / σ

Lapho u-Z engumphumela ka-Z, u-X inani ledatha ngayinye, u-μ isho idatha, futhi u-σ ukuchezuka okujwayelekile kwedatha.

7. Yini ukubaluleka kwesikolo esingu-Z kuzibalo?

Ezibalweni, isikolo sika-Z sibalulekile ngoba sikuvumela ukuthi uqhathanise amanani esikalini noma amayunithi ahlukene, uhlonze abangaphandle, futhi uqonde ukusatshalaliswa nokuhlukahluka kwedatha esethwe ngokunembe kakhudlwana. Kubalulekile futhi ekuhlaziyweni kokujwayelekile kanye nokwenza izinqumo eziqhutshwa yidatha.

8. Yiziphi izinhlelo zokusebenza zesikolo esingu-Z ku-Google AmaSpredishithi?

Isikolo sika-Z ku-Google AmaSpredishithi sinezinhlelo zokusebenza eziningi, okuhlanganisa ukuhlaziywa kwedatha, ucwaningo lwesayensi, ukwenza izinqumo zebhizinisi, ukuhlaziywa kwezezimali, nokuhlolwa kokusebenza ezindaweni ezahlukene.

9. Isetshenziswa kanjani imisebenzi yezibalo ku-Google AmaSpredishithi ukuze ubale isikolo esingu-Z?

Ukuze ubale isikolo esingu-Z ku-Google AmaSpredishithi usebenzisa imisebenzi yezibalo, landela lezi zinyathelo:

1. Faka idatha yakho kusipredishithi ku-Google AmaSpredishithi.
2. Sebenzisa umsebenzi othi =AVERAGE(datarange) ukuze ubale incazelo.
3. Sebenzisa umsebenzi othi =DEVEST(ububanzi bedatha) ukuze ubale ukuchezuka okujwayelekile.
4. Sebenzisa ifomula =(X – μ) / σ ukuze ubale isikolo esingu-Z sephoyinti ledatha ngayinye, lapho u-X eyinani ngalinye, u-μ uchaza, futhi u-σ ukuchezuka okujwayelekile.

10. Ngingalutholaphi ulwazi olwengeziwe mayelana ne-Z-score ku-Google AmaSpredishithi?

Ungathola ulwazi olwengeziwe mayelana nesikolo esingu-Z ku-Google AmaSpredishithi kokufundisa ku-inthanethi, izinkundla zosizo ze-Google AmaSpredishithi, amabhuku ezibalo, nezinsiza zemfundo ekuhlaziyweni kwedatha nezibalo.

Ngizokubona ngemva kwesikhathi, Tecnobits! Khumbula ukuthi ku-Google AmaSpredishithi ungakwazi ukubala isikolo esingu-Z kalula. Sifunde maduze.