Question

A set of 500-g masses is placed one at a time on a digital balance during quality control testing. The mass reading are 397 g, 401g, 403 g. Describe the accuracy and precision of the scale. (1 point)
Responses

Accurate but not precise
Accurate but not precise

Precise but not accurate
Precise but not accurate

Not accurate and not precise.
Not accurate and not precise.

Both accurate and precise

Answer 1

To determine the accuracy and precision of the scale based on the mass readings provided (397 g, 401 g, and 403 g) compared to the target mass of 500 g, we can analyze them as follows:

- **Accuracy** refers to how close the measurements are to the true value (in this case, 500 g). The readings are all significantly lower than 500 g, indicating that they are not accurate.

- **Precision** refers to how consistent the measurements are with each other. The values 397 g, 401 g, and 403 g are relatively close to each other, indicating a degree of precision.

Based on this analysis, the scale is **Not accurate** (because the readings are not close to the true value of 500 g) and **Precise** (because the readings are consistent with one another). Therefore, the correct response is:

**Not accurate and not precise.**