1. Lesson 2

Mathematics 30-3 Module 6

Module 6: Measurement

 

Lesson 2: Uncertainty

 
Focus

 

This is a photograph of someone having their hair cut with scissors.

Jupiterimages/Comstock/

Thinkstock

Going for a haircut can be a very stressful situation for some people. Their definition of a trim could be very different from their stylist’s definition. Asking for an inch to be cut off could vary in length from very little to a major haircut. The amount of hair that is cut is an estimation by the customer and the stylist. There is uncertainty when people refer to measurements, and uncertainty is connected to the precision of the measurement tool used. Next time you go for a haircut, would you expect your stylist to use a tape measure to help with the cut you’re expecting?

 

Lesson Outcome

 

At the end of this lesson you will be able to understand the limitations of measuring instruments relating to precision and uncertainty.

 

Lesson Questions

 

You will investigate the following questions:

  • How is uncertainty related to precision?
  • Why is it important to account for the uncertainty of a measurement?
Assessment

 

Your assessment may be based on a combination of the following tasks:

  • completion of the Lesson 2 Assignment (Download the Lesson 2 Assignment and save it in your course folder now.)
  • course folder submissions from Try This and Share activities
  • additions to Glossary Terms
  • work under Project Connection