Sentences with phrase «introduces selection bias»

But that introduces selection bias, small sample size, and it's hard to know if lawyers are reporting accurately.

A second limitation was the loss of nearly 40 % of the weight and height data at age 4 years, which could have introduced selection bias.

Not exact matches

Before discussing selection that would bias assessments of special language program performance downward, I will address two factors that could introduce upward biases.

As discussed above, these variables are used to account for the potential selection bias introduced because of the differences between the populations at choice schools compared to traditional public schools.

This scale factor defines the bias introduced by a particular selection of ocean cores, failure of that distribution to represent a true global average, and various assumptions in converting the proxy data into a temperature change.

Although randomization design reduces selection bias, it introduces possible spillover effects.

Second, the attrition rates in this study were substantial, which of course introduces the possibility of a selection bias.