Answer: Good precision (small spread between readings) along with reasonable accuracy (close to the true value).
- A Good precision but poor accuracy, since the readings cluster tightly but land far from the true value
- B Poor precision but good accuracy, since the readings vary widely yet average to the true value
- C Good precision (small spread between readings) along with reasonable accuracy (close to the true value)
- D Poor precision and poor accuracy, since the readings neither cluster nor approach the true value
Correct answer: C. Good precision (small spread between readings) along with reasonable accuracy (close to the true value)
Explanation: The four readings are close to each other (high precision) and all lie near the accepted value of 2.998 x 10<sup>8</sup> m/s (high accuracy), so the data set shows both qualities together.
The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.
Concept context
SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.