Percent Error and Measurement Concepts

The video tutorial explains how to calculate percent error, which involves subtracting the true value from the experimental value, taking the absolute value, dividing by the true value, and converting to a percentage. Two examples are provided: one using a bathroom scale and another using a circle's diameter. Each example demonstrates the step-by-step process of calculating percent error and emphasizes the importance of using absolute values and converting to percentages.

What is the formula for calculating percent error?

• Experimental value minus true value, divided by true value, times 100

• True value plus experimental value, divided by experimental value, times 100

• True value minus experimental value, divided by experimental value, times 100

• Experimental value plus true value, divided by true value, times 100

Which of the following is NOT a term used for the true value?

• Standard value

• Actual value

• Imaginary value

• Real value

In the bathroom scale example, what is the experimental value?

• 142 pounds

• 140 pounds

• 135 pounds

• 137 pounds

What is the percent error of the bathroom scale measurement?

• 4.5%

• 3.5%

• 4.9%

• 5.2%

What should you remember to do when converting a decimal to a percent?

• Divide by 100

• Subtract 100

• Multiply by 100

• Add 100

In the circle diameter example, what is the student's measured value?

• 3.7 cm

• 3.9 cm

• 3.8 cm

• 4.0 cm

What is the true diameter of the circle in the second example?

• 3.9 cm

• 3.8 cm

• 3.7 cm

• 3.6 cm

How do you handle negative values in percent error calculations?

• Add them to the true value

• Subtract them from 100

• Convert them to positive

• Ignore them

What is the percent error in the student's circle measurement?

• 2.5%

• 2.7%

• 3.0%

• 2.9%

Why is it important to box the final answer in calculations?

• To separate it from the question

• To make it look neat

• To ensure it is not forgotten

• To highlight it as the final answer