Measurement Errors and Uncertainty Quiz

Which type of error affects the precision of a measurement and results in a spread of readings?

• Systematic errors

• Random errors

• Personal errors

• Calibration errors

What is a key characteristic of systematic errors?

• They vary unpredictably

• They cause a consistent deviation from the true value

• They can be reduced by repeating measurements

• They are only present in digital instruments

Why are repeated measurements important in experiments?

• To eliminate systematic errors

• To reduce the effect of random errors

• To increase the precision of systematic errors

• To account for personal biases

Mistakes in measurements should be:

• Included in the data analysis to provide a complete picture

• Corrected and the experiment repeated correctly

• Considered as systematic errors

• Ignored as they do not affect the overall results

The uncertainty of a measurement result reflects:

• The precision of the instrument used

• The lack of exact knowledge of the quantity being measured

• The number of significant figures reported

• The presence of systematic errors

Which of the following numbers has three significant figures?

• 0.043

• 42.00

• 40

• 0.0400

An outlier in a dataset should be:

• Automatically dismissed to maintain data integrity

• Further analyzed and accounted for ethically

Leading zeros in a number are:

• Always significant

• Never significant

• Significant only if followed by a decimal point

• Significant only if they occur between non-zero digits

When evaluating data, students should be able to identify:

• Only the systematic errors

• Only the random errors

• Contradictory, provisional, and incomplete data

• The correct calibration method

Which of the following best defines accuracy in measurements?

• The consistency of repeated measurements

• The closeness of a measurement to the true value

• The ability to get the same result under unchanged conditions

• The variability in the measurements obtained