Systematic Error and Random Error

Which best describes the target?

• Precise, but not accurate

• Accurate but not precise

• Precise and accurate

• Neither accurate nor precise

Which best describes the target?

• A lot of systematic error

• A lot of random error

• No random error

A student uses a different balance for the third trial of their experiment. This would be an example of:

• random error

• systematic error

Which student is the most ACCURATE?

• A

• B

• C

What is the length of the black bar?

• 5 cm
• 4.300 cm
• 4.30 cm
• 4.3 cm

What is the volume of liquid in this burette?

• 7.35 mL
• 7.350 mL
• 6.65 mL
• 6.650 mL

A measurement result is considered ________ if it is judged to be close to the true value. It is influenced by random and systematic errors.

• Precise

• Accurate

• An error

• Resolution

A quality denoting the closeness of agreement (consistency) between values obtained by repeated measurement. It is influenced by random effects and can be expressed numerically.

• Repeatability

• Precision

• Uncertainty

• Resolution

Accuracy means

• the measurements are close to each other

• the measurement is close to the true value

• the measurements are close to each other

• the measurements are close to each other and the true value.

Systematic errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument