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Alle uitgewerkte topics die nodig zijn voor MTB1

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Uitwerking van de kennisclip over type 1 en type 2 fouten die tijdens het vak MTB1 van de premaster Health Sciences aan bod komt.

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Kennisclip type 1- en type 2 fouten

Hypotheses en wat er allemaal mis kan gaan
- In de statistiek maken we een afweging over hoeveel onzekerheid we over de waarheid
accepteren.
- Bij α < 0.05 zouden we de nulhypothese H 0 verwerpen.
- Als we α < 0.05 vastleggen, zeggen we dus ook dat we 5% onzekerheid accepteren, of dat we
5% kans hebben dat we onterecht een nulhypothese verwerpen.
- Dat is dus 1 van de 20 hypothesen die getoetst worden!
- In 1 van de 20 toetsen maken we een fout en verwerpen H 0 terwijl dit niet terecht is.

Foute beslissingen
- Toetsen is kiezen tussen modellen (H0 of H1)




Type 1 fout: vals alarm/fout positief

- Verwerpen van ware nulhypothese
- α symbool kans hierop
- α = Pr(verwerpen | H0)
- Waarde α kies je zelf
- Dit betekent: We denken dat er een verband/associatie is, terwijl dat niet het geval is

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Uploaded on
September 20, 2023
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Written in
2022/2023
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Class notes
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