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Samenvatting oefenzittingen Farmaceutische Data-analyse (Ko8B6A)

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Samenvatting van alle oefenzittingen van Farmaceutische Data-analyse (Ko8B6A)

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Frequentetabel = nominaal, ordinaal en discreet
- Frequentie
- Proportie
- Cumulatieve frequentie
- Cumulatieve proportie

Kerngetallen = continue
- Centrummaten
o Modus
o Mediaan
o Gemiddelde
- Spreidingsmaten
o Bereik
o Standaarddeviatie
o Variantie
o IQR

2 nominale/discrete/ordinale variabelen = kruistabel/contingentietabel
1 discrete/nominale/ordinale variabele en 1 continue variabele = breakdown tabel

2 continue variabelen = correlatie berekenen
- Tussen -1 en 1
o Teken
 + = positief verband: hoge waarde van ene variabele geassocieerd met
hogere waarde van andere variabele (lengte en gewicht
 - = negatief verband: hoge waarde van ene variabel gelijk met lage waarde
van andere variabele. (T en hoogte zeespiegel)
o Absolute waarde = sterkte van verband
 Hoe hoger: hoe meer op 1 lijn = perfecte lijn
 Meer afwijken van de lijn = lagere correlatie
- Correlatie = 0: geen verband (binair)




1 discrete/nominale/ordinale variabele = taart, staaf of lijndiagram
1 continue variabele = histogram of boxplot
2 discrete/nominale/ordinale = tart, staaf of lijn
1 continue variabele met 1 dNO = histogram en boxplot
2 continue variabelen = scatterplot

, Betrouwbaarheidsintervallen
- Inferentiële statistiek = conclusies veraglemenen van sample naar populatie
- Confidence interval = interval van plausibele waarden voor de populatieparameter.



= 95% betrouwbaarheid interval

Parameters van CI van het gemiddelde
- Steekproefgrote
- Variantie van de variabele
- betrouwbaarheid

Hypothesetoetsing
1. Formulering nulhypothese (populatie), alternatieve hypothese (zelfde populatieparameter,
over nulhypothese) en significantieniveau (moment dat we nulhypothese verwerpen)
2. Zoek een teststatistiek en zijn verdeling (2 keer alfa/2 aan de kanten van grafiek weg)




3. Berekend de p-waarde voor geobserveerde teststatistiek
Hoe kleiner, hoe kleiner evidentie tegen H0
P < alfa (type 1 fout) = verwerp nulhypothese
4. Conclusie




Ho = gemiddelde nogsteed 14,6
Ha = gemiddelde niet gelijk aan 14,6

Alfa = 5%
S2 = 24,01

(15,9 – 14,6 ): (0,05(hier ook wortel van want wij hebben kwadraat): (wortel:147)

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