Hallo ihr tollen Statistiker,
ich habe folgende Aufgabe nicht lösen können Morgen ist Einreichtermin und ich sitze immer noch dran. Könnte sich jemand erbarmen und mir helfen oder Beispielrechnung sogar geben?
"Suppose you are a researcher who wishes to investigate whether Vitamin D reduces the 5-year risk of prostate cancer in Irish males over 40 years of age. You plan to recruit a sample from this population, and randomly assign them to treatment arms (placebo vs vitamin D) in a 1:1 ratio. You wish to apply for regulatory approval for the study. As part of your submission, you need to decide on the required sample size for the study. Carry out a sample size calculation for this study, and write a paragraph describing the sample size calculation.
Hint: you should consult the literature on prostate cancer to support your sample size calculation (e.g. to find a good estimate of % of the target population that develop prostate cancer in a 5-year period). You should cite any sources you use, including any statistical software you used to carry out the sample size calculation."
Das wäre meine Rettung!!!!