Chapter 2, Problem 4STP

Interpretation Introduction

Interpretation:

The true statement needs to be determined.

Concept introduction:

Accuracy defined as an accurate measurement that is close to the accepted value whereas, Precision defined as a set of precisemeasurements that shows a little variation.

Answer to Problem 4STP

Correct answer: The correct option is (a).

Explanation of Solution

Reason for correct option: In the given table each student measured the length of Stamp. They reported calculated lengths for each trial and an average of all the three calculations. Student 2’s measurements are both, accurate and precise, because closest to the accepted value and also closest to one another.

As the results are close to each other and the final result is closely accurate. Hence, the correct option is (a).

Conclusion

Reasons for incorrect options:

Option (b): Student 1’s measurements are not more accurate than Student 3 because they are not closest to the accepted value. Hence, this is an incorrect option.

Option (c): Student 2’s measurements are both, accurate and precise. Hence, this is an incorrect option.

Option (d): The data of Student 3 are not close to the accepted value, nor are they closeto each another. Hence, this is an incorrect option.