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Stappenplan SPSS - Introduction to Statistical Analysis

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Overzicht van alles wat je moet kunnen voor de SPSS-toets voor CM1005 Introduction to Statistical Analysis. Alle verschillende testen en opties worden stap voor stap (met afbeeldingen) uitgelegd.

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Statistiek Overzicht

Week 1

Statistics: The study of how we describe and make inferences from data
Descriptive statistics: Statistieken om losse variabelen te beschrijven.
Inferential statistics: Statistieken om conclusies tussen variabelen te omschrijven.

Unit of analysis: Datgene wat wordt bestudeerd
Variabele: Datgene wat van een unit of analysis wordt bestudeerd.

Levels of measurement:
- Nominaal: Groep classificatie, geen ranking, numerical coding arbitrary
- Ordinaal: Ranking, afstand tussen categorieën niet bekend/gelijk
- Interval: Meaningful ranking en gelijke afstanden tussen categorieën
- Ratio: Ranking, gelijke afstanden en een obsolute en betekenisvolle 0

Continuous variabele: Gemeten over een continuüm, bv lengte. (precies)
Discrete variabele: Gemeten in hele units of categorieën, bv leeftijd (afgerond)

Central tendency: To describe the distribution of variables on different levels of measurement.
- Mean: Gemiddelde (interval en ratio)
- Median: Middelste score (ordinaal, interval en ratio)
- Mode: meest voorkomende score (nominaal, ordinaal, interval en ratio)
In een normale distributie hebben de mean, median en mode dezelfde waarde.




M=
∑x μ=
∑x
n N
Sample Mean Population Mean
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