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ZingPath: Linear Relationships and Real World Modeling

Accuracy and Precision

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Linear Relationships and Real World Modeling

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Lesson Focus

Accuracy and Precision

Algebra Foundations

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You get to learn interesting new details all about the process of science, and uncover the fundamentals of the metric system and significant figures.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Explain accuracy and precision in data collecting.
  • Realize that data can be precise but not accurate, and vice versa.

Everything You'll Have Covered

Why are student A's measurements said to be accurate but student C's are not?

~ When comparing student A's recorded data with the expected value, we can determine that student A was able to take good measurements because his data is very close to the expected value of 1.59. Student C's data averages to 1.70 and is .11 away from the expected value.

Why are student C's measurements said to be very precise?

~ To check the precision of an experiment, we must analyze the consistency of the data when we perform the experiment more than once. Student C's results, 1.70, 1.69, 1.71, are all very close to each other. Therefore, we can say that student C's measurements are very precise.

When experiments are conducted, what are some possible reasons for the differences in measurements?

~ The differences in measurements might be due to the precision of the measurements obtained from the devices that were utilized. For example, an electronic scale will yield more accurate results than an equal-arm balance scale. In addition, inaccurate readings and incorrect calibration of equipment could also result in differing measurements and inaccurate results.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should be able to define accuracy, balance, and chemistry.
Course Algebra Foundations
Type of Tutorial Animation
Key Vocabulary accuracy, balance, chemistry