Lecture video for “Data Sense: An Introduction to Statistics for the Behavioral Sciences” by Barton Poulson. This video covers Chapter 06: Sampling Distributions, Section 02: Bias in Estimation. It explains the potential for bias in estimation, which means that when population formulas are used with sample data, the answer is consistently off in one direction. The example of the standard deviation is discussed. The book and complete set of videos may be purchased at http://kendallhunt.com/poulson/.