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Samenvatting Statistiek: Stappenplan SPSS

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Stappenplan SPSS met formules, voorwaarden, begrippen ...

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Select cases..........................................................................................................................................................2
Missings bij het analyseren van meerdere variabelen........................................................................................2

Afronden...................................................................................................................................................... 2
Datasets...............................................................................................................................................................3
Controle variabelen.............................................................................................................................................3
Data sorteren......................................................................................................................................................3
Exploratie van gegevens......................................................................................................................................3
verschillende variabelen tegelijk via explore.........................................................3
Verdeling van gegevens......................................................................................................................................3
Visualisatie van de variabelen.............................................................................................................................4
Groepen vergelijken............................................................................................................................................4
Select cases..........................................................................................................................................................4
+ aantal cases die aan een voorwaarde voldoen (vb. select : minstens…)..........4
+ missings.............................................................................................................4

PC2 : verbanden............................................................................................................................................ 6
Aanmaken nieuwe variabele...............................................................................................................................6
⟶ Numeric expression..........................................................................................6
⟶ Statistical functies............................................................................................6
Hercoderen variabelen........................................................................................................................................6
Boxplot................................................................................................................................................................7
Scatterplot...........................................................................................................................................................7
Kruistabellen........................................................................................................................................................7
Correlatie.............................................................................................................................................................8

PC3 : univariate inferentie............................................................................................................................. 8
Werken met syntax.............................................................................................................................................8
Betrouwbaarheidsinterval...................................................................................................................................8
Hyphotesetest.....................................................................................................................................................8
Veronderstellingen controleren...........................................................................................................................9
Normaal verdeeld ?................................................................................................9
Geen uitschieters ?................................................................................................9
Univariate test van gemiddelde..........................................................................................................................9
p-waarde bepalen..................................................................................................9

PC4 : bivariate inferentie............................................................................................................................. 11
Samenhang tussen twee categorische variabelen............................................................................................11
Samenhang tussen kwantitatieve en kwalitatieve variabele............................................................................12
Twee kwantitatieve variabelen (Het verschil van twee variabelen vergelijken)...............................................14
Verschilvariabele (paired-sample T-test).............................................................14
Overzicht testen.................................................................................................................................................15
Overzicht voorwaarden.....................................................................................................................................15

, Missing data in SPSS
!! aanduiden via variable view


Select cases

respondenten selecteren aan de hand van missende waardes

Data > Select Cases > Function Group > Missing Values

NMiss(Var,..,..) : aangeven dat respondent # missings mag hebben op al deze
variabelen
NValid(Var..,..,..) : aangeven dat respondent # geldige antwoorden moet hebben
op desbetreffende variabelen (anders ongeldig)


Missings bij het analyseren van meerdere variabelen

Analyze > Descriptives ⟷ Analyze > Descriptives > Explore

= verschillende N = N : enkel respondenten die op alle
variabelen geen
missings hebben (zie percentage van
steekproef)

!! explore met één variabele : andere N
(antwoord op die variabele)


Afronden

!! drie cijfers na de komma

Dubbelklik tabel > Dubbelklik getal

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