\n Ca\u0142kowity<\/td>\n 800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n Aby ustali\u0107, czy zaobserwowane warto\u015bci s\u0105 r\u00f3wnowa\u017cne warto\u015bciom oczekiwanym, przeprowadzimy test dobroci dopasowania. Hipotez\u0105 zerow\u0105 i hipotez\u0105 alternatywn\u0105 testu s\u0105:<\/p>\n<\/p>\n
W tym przypadku do testu zastosujemy poziom ufno\u015bci 95%, zatem poziom istotno\u015bci wyniesie 5%.<\/p>\n<\/p>\n
Aby znale\u017a\u0107 oczekiwane warto\u015bci sprzeda\u017cy, musimy pomno\u017cy\u0107 procent oczekiwanej sprzeda\u017cy ka\u017cdego produktu przez liczb\u0119 ca\u0142kowitej sprzeda\u017cy:<\/p>\n<\/p>\n
Dlatego tabela cz\u0119stotliwo\u015bci problem\u00f3w wygl\u0105da nast\u0119puj\u0105co:<\/p>\n\n\n\n\n Produkt<\/th>\n Zaobserwowana sprzeda\u017c (O i<\/sub> )<\/th>\n Oczekiwana sprzeda\u017c (E i<\/sub> )<\/th>\n<\/tr>\n<\/thead>\n\n\n Produkt A<\/td>\n 453<\/td>\n 400<\/td>\n<\/tr>\n \n Produkt B<\/td>\n 268<\/td>\n 280<\/td>\n<\/tr>\n \n Produkt C<\/td>\n 79<\/td>\n 120<\/td>\n<\/tr>\n \n Ca\u0142kowity<\/td>\n 800<\/td>\n 800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n Teraz, gdy obliczyli\u015bmy wszystkie warto\u015bci, stosujemy wz\u00f3r testu chi-kwadrat do obliczenia statystyki testowej:<\/p>\n<\/p>\n
Po obliczeniu warto\u015bci statystyki testowej u\u017cywamy tabeli rozk\u0142adu chi-kwadrat, aby znale\u017a\u0107 warto\u015b\u0107 krytyczn\u0105 testu. Rozk\u0142ad chi-kwadrat ma<\/p>\n<\/p>\n
stopni swobody i poziomu istotno\u015bci<\/p>\n
,Ju\u017c:<\/p>\n<\/p>\n
Zatem statystyka testowa (21,53) jest wi\u0119ksza od krytycznej warto\u015bci testowej (5,991), dlatego hipotez\u0119 zerow\u0105 odrzuca si\u0119 i przyjmuje hipotez\u0119 alternatywn\u0105. Oznacza to, \u017ce dane s\u0105 bardzo r\u00f3\u017cne i dlatego w\u0142a\u015bciciel sklepu spodziewa\u0142 si\u0119 innej sprzeda\u017cy ni\u017c faktycznie zrealizowana.<\/p>\n<\/p>\n
W tym artykule wyja\u015bniono, czym jest test dobroci dopasowania i do czego s\u0142u\u017cy w statystyce. Pokazuje r\u00f3wnie\u017c, jak wykona\u0107 test dopasowania, a dodatkowo b\u0119dziesz m\u00f3g\u0142 zobaczy\u0107 krok po kroku rozwi\u0105zane \u0107wiczenie. Co to jest test dopasowania? Test dobroci dopasowania to test statystyczny, kt\u00f3ry pozwala nam okre\u015bli\u0107, czy pr\u00f3bka danych pasuje do okre\u015blonego rozk\u0142adu prawdopodobie\u0144stwa . […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-322","post","type-post","status-publish","format-standard","hentry","category-statystyka"],"yoast_head":"\n
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\\chi^2_{1-\\alpha|k-1}\\text{ se rechaza } H_0\\end{array}” title=”Rendered by QuickLaTeX.com” height=”70″ width=”243″ style=”vertical-align: 0px;”><\/p>\n<\/p>\n![\"\\alpha=0,05\"](\"https:\/\/statorials.org\/wp-content\/ql-cache\/quicklatex.com-76d20f2945704d6640a4b9986b8b7c16_l3.png\" "\\"Rendered")
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5,991 \\ \\color{orange}\\bm{\\longrightarrow}\\color{black} \\ \\text{Se rechaza } H_0″ title=”Rendered by QuickLaTeX.com” height=”17″ width=”354″ style=”vertical-align: -4px;”><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"