Quiz on Precision and Accuracy in Measurement

What is the main difference between precision and accuracy?

• Precision refers to how close a measurement is to the actual value, while accuracy refers to how exact a measurement is.

• Precision is about the number of decimal places in a measurement, while accuracy is about how close a measurement is to the actual value.

• Precision is about the reliability of an instrument, while accuracy is about the number of decimal places.

• Precision and accuracy are the same concepts.

In the jellybean example, why was Sally's guess considered more accurate than Sid's?

• Sid's guess was not a whole number.

• Sally's guess was exactly the same as the actual number.

• Sally used a more precise method to count the jellybeans.

• Sally's guess was closer to the actual number of jellybeans.

How can you verify the accuracy of a measurement instrument?

• By measuring the same object multiple times.

• By using it in different weather conditions.

• By checking it against a trusted, known source.

• By comparing it to another instrument of the same type.

What determines the precision of a measurement?

• The measurement device used.

• The temperature at which the measurement is taken.

• The number of times the measurement is repeated.

• The size of the object being measured.

Why is it important to use appropriate levels of precision in measurements?

• To ensure the measurement makes real-world sense.

• To match the precision level of other measurements.

• To avoid unnecessary complexity in calculations.

• To ensure the measurement is always accurate.