Question
A set of 250-g masses is placed one at a time on a digital balance during quality control testing. The mass reading are 197 g, 198 g, 196 g. Describe the accuracy and precision of the scale. (1 point)
A Both accurate and precise
B Neither accurate or precise
C Accurate but not precise
D Precise but not accurate
A Both accurate and precise
B Neither accurate or precise
C Accurate but not precise
D Precise but not accurate
Answers
GPT-4o mini
To assess the accuracy and precision of the scale based on the given mass readings of 197 g, 198 g, and 196 g, we can define the terms:
- **Accuracy** refers to how close the measured values are to the true value (in this case, 250 g).
- **Precision** refers to how close the measured values are to each other.
1. **Accuracy**: The readings (197 g, 198 g, and 196 g) are far from the true mass of 250 g, indicating that the scale is not accurate.
2. **Precision**: The readings are close to each other, as they are all around 197 g. This indicates that the scale is precise.
Based on this analysis, the answer would be:
**D: Precise but not accurate.**
- **Accuracy** refers to how close the measured values are to the true value (in this case, 250 g).
- **Precision** refers to how close the measured values are to each other.
1. **Accuracy**: The readings (197 g, 198 g, and 196 g) are far from the true mass of 250 g, indicating that the scale is not accurate.
2. **Precision**: The readings are close to each other, as they are all around 197 g. This indicates that the scale is precise.
Based on this analysis, the answer would be:
**D: Precise but not accurate.**