Question

analyzing and reporting data
scientist 1
trial # length (cm)
1 8.4
2 8.2
3 8.6
average 8.4
scientist 2
trial # length (cm)
1 8.4
2 8.3
3 8.3
average 8.3
which statement best describes the relative precision of the two scientists?
both scientists have the same level of precision.
scientist 1 has greater precision than scientist 2.
scientist 2 has greater precision than scientist 1.

Explanation:

Step1: Calculate range for scientist 1

The values for scientist 1 are 8.4, 8.2, 8.6. Range = Maximum - Minimum = 8.6 - 8.2 = 0.4

Step2: Calculate range for scientist 2

The values for scientist 2 are 8.4, 8.3, 8.3. Range = Maximum - Minimum = 8.4 - 8.3 = 0.1

Step3: Compare ranges

A smaller range indicates greater precision. Since 0.1 < 0.4, scientist 2 has greater precision.

Answer:

Scientist 2 has greater precision than scientist 1.