1C Collecting Data

The difference between personal, systematic, and random errors is:

• Personal errors are due to human mistakes, systematic errors are consistent inaccuracies, and random errors are unpredictable variations.

• Personal errors are unpredictable variations, systematic errors are due to human mistakes, and random errors are consistent inaccuracies.

• Personal errors are consistent inaccuracies, systematic errors are unpredictable variations, and random errors are due to human mistakes.

The difference between accuracy and precision is:

• Accuracy refers to how close a measured value is to the true value, while precision refers to how close the measured values are to each other.

• Accuracy and precision both refer to how close a measured value is to the true value.

• Accuracy refers to the consistency of measurements, while precision refers to the correctness of measurements.

• Accuracy and precision are interchangeable terms in measurement.

What is a personal error?

• A mistake made by an individual due to personal judgment

• An error caused by a machine malfunction

• A type of error that occurs in a group setting

• An error that is always intentional

Which of the following is an example of a personal error?

• Using the correct formula in data analysis

• Breaking equipment

• Accurate measurement

• Proper experiment design

What causes readings to differ from the accepted value by a consistent amount each time a measurement is made?

• Random error

• Systematic error

• Human error

• Instrumental error

Which of the following is a common source of systematic errors?

• Random fluctuations

• Faulty calibration of measuring instruments

• Accurate measurements

• Repeated measurements

True or False: The accuracy of measurements subject to systematic errors can be improved by repeating those measurements.

• True

• False

What are random errors?

• Errors that occur unpredictably and without a pattern

• Errors that occur due to systematic issues

• Errors that can be easily corrected

• Errors that are intentional

What is the effect of systematic errors on measurements?

• They can be improved by averaging multiple measurements.

• They cannot be improved by averaging multiple measurements.

• They are random and unpredictable.

The effect of random errors can be reduced by using an averaged result from ________ measurements.