I calculated the sample size required for a kappa test (to compare the
performance of a new lab test against the old one) in STATA using the
command "sskdlg". I realized however that the program does not allow me
to input the statistical power on which to base the sample size
estimation. As I am testing the same samples by two test methods
(unlike two proportion comparison where samples come from different
populations), I am wondering whether I should not be worrying about
statistical power at all. Could someone please suggest.
Thanks in advance
Shiva Ghimire
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