If the former is true, then their results may be optimistic, as the feature selection algorithm had access to the test data.
The confidence intervals and p-values for the coefficients and odds ratios in the multivariate regression models must also be viewed as exploratory because both tend to be over-optimistic in forward variable selection.
This is not surprising since forward selection is often optimistic since the selection process, unlike the stepwise and backward selection methods, does not involve an elimination step even if the variable already included does not contribute much in the presence of other variables.
The optimistic view is therefore that selection will continue to be equally effective in rescuing populations that experience high levels of stress, so that extinction rates will not exceed long-term averages except, perhaps, when extinction is willfully pursued, for example through pest eradication or overfishing.
We report the results of an experiment that allows us to quantify the optimistic bias induced by optimal tuning parameter selection (bias source I) and optimal selection of the classification method (bias source II) in a realistic setting based on original microarray data.
In light of his national security selections, we can be optimistic about that judgment.
If few begrudged him that moment, he was aided at The Oval by an England selection that was at best optimistic and at worst a wayward gamble.
But sellers are also optimistic about some of this year's grittier selections because they are so topical.
This might have led to the selection of some unduly pessimistic or optimistic views.
We define a capacity reliability metric to combine the effects of both factors in node selection, and propose Best-fit algorithms with optimistic and pessimistic selection strategies to find the best qualified nodes on which to instantiate VMs to run user jobs.
