that maximum likelihood estimates of k can be biased upward by small sample size or under - reporting of zero - class events ,
but are not biased downward by any of the factors considered .
Results show that maximum likelihood estimates of k can be biased upward by small sample size or under - reporting of zero - class events , but are not biased downward by any of the factors considered .
Results show that maximum likelihood estimates of k can be biased upward by small sample size or under - reporting of zero - class events , but are not biased downward by any of the factors considered .