What Is True of Bias? Select All That Apply

Multiple Choice

What is true of bias? Select all that apply.

A) Bias, as defined in this chapter, is conceptually the same as defined in previous chapters, thus bias transcends all types of research.
B) Bias occurs if the observed estimate of a measure tends to deviate from its true value.
C) Selection bias results from errors in classification of risk status or disease status.
D) Bias can be introduced a number of ways through selection, information, and the measurement being used.