Uncertainty in measurement

Random errors lead to a lack of:

• accuracy in the measurement.

• significant digits in the measurement.

• precision in the measurement.

• gradation of the measuring instrument

length?

• 3.2 cm

• 3.12 cm

• 3 cm

• 3.219 cm

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

Which of these is NOT true for systematic errors?

• They arise due to errors in the measuring instruments used.

• Repeating the observations or increasing the sample size can eliminate them

• They are reproducible inaccuracies that are consistently in the same direction.

• They arise from the design of the study.

Repeated measurements of a quantity can reduce the effects of

• both random errors and systematic errors

• neither random errors nor random errors

• random errors

• systematic errors

How close a measurement is to the true value is called..

• Accuracy

• Precision

• Significant

• Estimate

This bullseye demonstrates...

• High Accuracy & High Precision

• High Accuracy & Low Precision

• Low Accuracy & High Precision

• Low Accuracy & Low Precision

How would you write 564,000,000 in scientific notation?

• 5.64 x 10^-7
• 5.64 x 10⁶
• 5.64 x 10⁸
• 56.4 x 10⁷

The advantages of this are: accuracy in performing manufacturing operations, reduce inspection, an ensure quality products by reducing errors in measurement.

• Primary Standards

• Secondary Standards

• Calibration

• Status of Calibration

A measure of consistency or repeatability of measurement.

• Precision

• Resolution

• Sensitivity

• Error