Precision and Accuracy

Front

What is the definition of precision in measurement?

Back

Precision refers to the degree to which repeated measurements under unchanged conditions show the same results. It indicates the consistency of measurements.

Front

What is the definition of accuracy in measurement?

Back

Accuracy refers to how close a measured value is to the actual (true) value. It indicates the correctness of a measurement.

Front

What is the difference between precision and accuracy?

Back

Precision is about consistency of measurements, while accuracy is about correctness in relation to the true value.

Front

What does it mean when a measurement has a degree of uncertainty?

Back

It means that there is an inherent limitation in the measurement process, leading to possible variations in the measured value.

Front

How can you improve the precision of a measurement?

Back

You can improve precision by using more refined measuring instruments, taking multiple measurements, and averaging the results.

Front

What is significant figures in measurement?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

Convert 7,000 g to kg.

Back

7,000 g = 7 kg.

Front

If a measurement is 5.0 cm with an uncertainty of ±0.1 cm, what is the range of possible values?

Back

The range of possible values is 4.9 cm to 5.1 cm.

Front

What is the formula for calculating percentage error?

Back

Percentage error = (|Measured Value - True Value| / True Value) x 100%.

Front

What is a systematic error?

Back

A systematic error is a consistent, repeatable error associated with faulty equipment or a flawed experiment design.