Two students independently determine the volume of water delivered by a 10.00-mL pipet.Each student takes 8 measurements,then computes the average volume delivered and the standard deviation.The results are tabulated below.

Which statement best describes the results?
A) A: good precision,good accuracy.B: good precision,good accuracy.
B) A: good precision,poor accuracy.B: poor precision,good accuracy.
C) A: poor precision,good accuracy.B: good precision,poor accuracy.
D) A: poor precision,poor accuracy.B: good precision,good accuracy.
E) A: poor precision,poor accuracy.B: poor precision,poor accuracy.

Question

Two students independently determine the volume of water delivered by a 10.00-mL pipet.Each student takes 8 measurements,then computes the average volume delivered and the standard deviation.The results are tabulated below.

Which statement best describes the results?

Which statement best describes the results?
A) A: good precision,good accuracy.B: good precision,good accuracy. 
B) A: good precision,poor accuracy.B: poor precision,good accuracy. 
C) A: poor precision,good accuracy.B: good precision,poor accuracy. 
D) A: poor precision,poor accuracy.B: good precision,good accuracy. 
E) A: poor precision,poor accuracy.B: poor precision,poor accuracy.

Quizplus · Accepted Answer

Student A has poor precision due to the high standard deviation and poor accuracy as the average is far from 10.00 mL. Student B has good precision due to the low standard deviation and good accuracy as the average is close to 10.00 mL.

Two Students Independently Determine the Volume of Water Delivered by a 10.00-ML