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17. Un chercheur mne une exprience comparant deux conditions de traitement, avec 25 scores dans chaque condition de traitement. a) Pour un test-t avec mesures

17. Un chercheur mne une exprience comparant deux conditions de traitement, avec 25 scores dans chaque condition de traitement. a) Pour un test-t avec mesures indpendantes, combien de sujets sont ncessaires pour l'exprience ? b) Pour un test-t avec mesures rptes, combien de sujets sont ncessaires pour l'exprience ? c) Pour un test-t avec mesures apparies, combien de sujets sont ncessaires pour l'exprience

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