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Learning Math Home
Session 1 Part A Part B Part C Part D Homework
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Session 1 Materials:

Session 1, Part C:
Bias in Measurement

In This Part: Measurement Error | Testing Your Measurement Bias

The difference between what individuals think they see (and how they see it) and the objective reality of what they have observed is called "visual error." These errors in perception, which can significantly misrepresent reality, are a natural consequence of being human.

In this Activity, you will have an opportunity to see how well you make two visual judgments. On a piece of paper, try drawing each of the graphics below, but with the length of segment BC equal to the length of AB. Then measure your segments to see how accurate your drawings are.

Line A Line B

Problem C1


Would you say that the errors you made in the visual judgments of the Interactive Activity were due to random error, or to bias? Why or why not?

Next > Part D: Bias in Sampling

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