Displaying 1 result from an estimated 1 matches for "d_app".
2008 Feb 21
1
bootstrap: definition of original statistic
...ginal statistic is simply the statistic
function evaluated on the original data (called t0).
However, in Harrell et al 1996 "Multivariable prognostic models..."
Stats Med vol 15, pp. 361--387, it is different (p. 372):
The statistic function evaluated on the original data is called
"D_app" (apparent statistic), whereas "D_orig" (original statistic)
is derived by first fitting the model to a bootstrap sample, then
freezing the model and applying it to the original data. The
bootstrap statistic D_boot is derived by applying the function to
the bootstrap sample. Then opt...