Question

analyzing and reporting data
student 1
trial mass (g)
1 125
2 128
3 133
average 129
student 2
trial mass (g)
1 128
2 129
3 130
average 129
which statement best describes the relative precision of the two students?
both students have the same level of precision.
student 2 has greater precision than student 1.
student 1 has greater precision than student 2.

Explanation:

Step1: Recall precision concept

Precision refers to the closeness of repeated measurements to each other.

Step2: Analyze Student 1 data

Student 1's measurements are 125, 128, 133. The differences between values are relatively large: \(|125 - 128|=3\), \(|128 - 133| = 5\).

Step3: Analyze Student 2 data

Student 2's measurements are 128, 129, 130. The differences between values are smaller: \(|128 - 129|=1\), \(|129 - 130| = 1\).

Answer:

Student 2 has greater precision than student 1.