Hello,
after a unsuccessful search in lists maliarchive I wonder how I could estimate the power of a sample size related to an unknown population.
Given the following (fake))situation:
I do have a database containing about 5 millions observations over 70 variables.
I would like to compute (as epidemiologists are used to) the required size of a sample to do some test on a test sample (test data), later doing some subsequent analysis of a new sample to build a prediction model.
Help facilities of R show some entries regarding power, but none of them seemed to be appropriate for my purpose (maybe I am wrong, but sometimes I have some difficulties to decipher the message of those tiny hints for available packages)
I would appreciate somebody effort to point me to the right package/function to archieve this task!
regards
Thomas
______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
