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Handleiding SPSS multivariate data analyse
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Handleiding van 7 pagina's voor het vak Multivariate data-analyse aan de VUB
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Multivariate data analyse: SPSS1. Statistieken van de variabelen opvragen
Analyse -> descriptive statistics -> descriptives ->
variabelen selecteren waarvan men statistieken wil weten
-> bij options aanduiden welke statistieken men wil weten
-> continue
Nog meer bijkomende info: Analyse -> descriptive
statistics -> explore -> bij dependent list aanduiden welke
variabelen men iets over wil weten -> bij statistics
gewenste parameters aanduiden -> bij plots eventueel
histogram, .. als men dit wil weten -> bij factor list
eventueel variabele invoeren om cases op te delen ->
continue
Interpretatie
o Standaardfout: nog herberekenen: S/ √n-1
o 5% trimmed mean: gemiddelde als we de 5%
uiterste waarnemingen buiten beschouwing laten
(als niet veel afwijken van gem -> dan beïnvloeden
uiterste waarnemingen niet veel)
o Skewness: parameter van fisher, symmetrie : pos =
rechtse symmetrie, neg = links symmetrie
o Kurtosis: neg = platykurtisch, pos = mesokurtisch
o Stem and leaf: geeft idee van verdeling, vooral
boxplot: zie boek! Vooral geschikt: positie, spreiding
& symmetrie van meerder variabelen vgl
(summaries for seperate variables) of
frequentieverdeling van versch groepen cases voor
1 variabele te bekijken (summaries for seperate
cases)
2. Interne consistentie nagaan
Multi-itemschaal maken: nagaan in welke mate
verschillende items naar hetzelfde peilen
Methode 1: transform -> compute -> bij target variable:
nieuwe naam invullen -> statistical klikken -> sum slepen
naar wit vakje -> item.. to item.. invullen -> continue dan
stap 2: Analyze -> correlate -> bivariate -> alles
selecteren -> paste klikken -> bij correlation: item.. TO
item.. WITH nieuwe variabele invullen -> in regel blijven
staan -> groene pijl klikken
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