Calculating Percentage Error Concepts

This video tutorial explains how to calculate percentage error using a specific formula. It provides three examples to demonstrate the calculation process, including handling negative values. The tutorial concludes with a mention of additional resources for further practice.

What is the formula for calculating percentage error?

• Measured value minus true value, divided by measured value, times 100

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

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

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

Why do we take the absolute value in the percentage error formula?

• To increase the percentage error

• To ensure the result is always positive

• To make the calculation easier

• To avoid using a calculator

In the first example, what is the percentage error when the measured height is 182 cm and the true height is 174 cm?

• 2.3%

• 8%

• 4.6%

• 6.4%

What is the first step in calculating the percentage error in the height example?

• Subtract the true value from the measured value

• Divide the measured value by the true value

• Multiply the measured value by the true value

• Add the true value to the measured value

In the first example, what is the difference between the measured and true height?

• 4 cm

• 10 cm

• 6 cm

• 8 cm

In the second example, what is the percentage error when the measured value is 250 and the true value is 253?

• 1.19%

• 3%

• 2.5%

• 0.5%

What does the absolute value operation do in the second example?

• It squares the value

• It halves the value

• It doubles the value

• It ignores the negative sign

What is the true value in the second example?

• 253

• 250

• 182

• 174

In the third example, what is the percentage error when the measured value is 33 and the true value is 40?

• 7%

• 10%

• 17.5%

• 5%

Why is the absolute value used in the third example?

• To divide the values

• To add the values

• To remove the negative sign

• To multiply the values