Answer:
This question lacks options, the options are:
A. Group C: 32.1 g, 35.0 g, 25.0 g
B. Group B: 25.5 g, 25.0 g, 24.8 g
C. Group A: 28.5g, 28.4 g, 28.5 g
D. Group D: 20.0 g, 25.0 g, 30.09
The answer is C. GROUP A
Explanation:
Precision in measurements refers to the degree of closeness between the repeated or measured values irrespective of how close they are to the true or accepted value, which is 25g in this case.
The precision of a measurement can be determined by simply finding the range (highest - lowest) of the measurements. The lowest range represents the most precise. The measurements for each group are:
Group C: 32.1 g, 35.0 g, 25.0 g
Range = 35.0 - 25.0 = 10g
Group B: 25.5 g, 25.0 g, 24.8 g
Range = 25.5 - 24.8 = 0.7g
Group A: 28.5g, 28.4 g, 28.5 g
Range: 28.5 - 28.4 = 0.1g
Group D: 20.0 g, 25.0 g, 30.09
Range = 30.09 - 25.0= 5.09g
Based on the ranges of the measurements in each group, one would notice that Group A has the lowest range (0.1g), hence, GROUP A is the most precise.
