Understanding Accuracy and Precision

Which of the following best describes accuracy?

• The closeness of a measured value to the true value.

• The consistency of repeated measurements.

• The difference between the highest and lowest measurements.

• The average of a set of measurements.

What does precision refer to in a set of measurements?

• How close the measurements are to each other.

• How close the measurements are to the actual value.

• The total range of the measurements.

• The number of measurements taken.

If a set of measurements is both accurate and precise, what does this indicate?

• The measurements are consistently close to each other and to the true value.

• The measurements are consistently close to each other but not to the true value.

• The measurements vary widely from each other but are close to the true value.

• The measurements are not consistent and not close to the true value.

Which scenario demonstrates high precision but low accuracy?

• Measurements are clustered tightly around the true value.

• Measurements are scattered around the true value.

• Measurements are consistently close to each other but far from the true value.

• Measurements vary widely and are far from the true value.

In an experiment, if a scientist takes multiple measurements of the same quantity and the results are consistently within a narrow range but differ from the known true value, what can be concluded about the measurements?

• The measurements are accurate but not precise.

• The measurements are precise but not accurate.

• The measurements are both accurate and precise.

• The measurements are neither accurate nor precise.

Which of the following statements is true about vectors?

• Vectors have only magnitude

• Vectors have both magnitude and direction

• Vectors are always positive

• Vectors cannot be added or subtracted

Which of the following operations is used to find the magnitude of the resultant vector from its components?

• Scalar multiplication

• Vector addition

• Vector subtraction

• Pythagorean theorem

A vector can be represented by which of the following?

• A number alone

• An arrow with direction

• A unit of time

• A temperature reading

The temperature of a room is 22°C.

• Scalar

• Vector

A car travels 50 km north.

• Scalar

• Vector