Navorsingsmethodes En Statistiek In De Revalidatiewetenschappen
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Oefeningen les 2: Beschrijvende statistiek
Voor je deze oefeningen start je eerst de frequenties lopen om foute waarden
eruit te halen. De verb van deze oef staat wel online in een video. Je moet
elke tabel met waarden nog zelf ingeven (gebruik copy paste zodat het sneller
gaat).
1. Geef voor onderstaande variabele “flexibiliteit” de vijfgetallensamenvatting (het
minimum, Q1, de mediaan, Q3, het maximum) en ook het gemiddelde en de
standaard deviatie.
Pp Flexibiliteit Pp Flexibiliteit Pp Flexibiliteit
1 6 9 4 17 6
2 8 10 10 18 8
3 5 11 6 19 10
4 3 12 4 20 2
5 8 13 7 21 5
6 6 14 8 22 4
7 8 15 9 23 6
8 6 16 6 24 7
Voor het gem, min, max en de standaardafw: analyse > descriptive statistics >
frequenties > statistics. Selecteer enkel de kolom van flexibiliteit!
Gem = 6.33, min = 2 en max = 10. Standaardafw = 2.078. Mediaan = 6,
Q1(percentile 25) = 5 en Q3(percentile 75) = 8. Je moet eerst nog bij ‘statistics’ alles
aanvinken wat je wilt zien (zie fluo op foto hieronder).
2. Bereken voor elke proefpersoon de Body Mass Index (BMI = gewicht / lengte²).
Geef het gemiddelde en de standaard deviatie.
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