|Title:||Interim Analysis and Data Monitoring in Clinical Trials||Authors:||Liu, Jen-Pei||Issue Date:||24-Aug-2006||Publisher:||臺北市:國立臺灣大學農藝學系||Abstract:||
Sample mean of N observations
The variance of sample mean =σ2/N.
The information about the population mean provided by the sample mean is N/σ2.
If σ2=1, the information about the population mean provided by the sample of N observation is simply the sample size N.
This is the definition of statistical information which can be also interpreted as the clinical information
The planned sample size is the minimum clinical and statistical information required to achieve the desired power for detecting a minimum clinically meaningful difference at a pre-determined risk of typeⅠerror.
|Appears in Collections:||農藝學系|
|interim analysis and data monitoring.pdf||1.21 MB||Adobe PDF||View/Open|
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