the most precise the most accurate length 14.54 cm

the most precise the most accurate length 14.54 cm

Consider the data obtained for the length of an object

as measured by three students.

The length is known to be 14.54 cm.

Which of the conclusions summarizes the data?

student A: 14.8 14.2 14.5 14.7 14.3

student B: 14.7 14.8 14.9 14.8 14.8

student C: 14.4 14.4 14.8 14.9 14.8

A, student B has done the most precise work and student C the most accurate

B. student B has done the most precise work and student A the most accurate

C. student C has done the most precise work and student B the most accurate

D. student C has done the most precise work and student A the most accurate

E. student A has done the most precise work and student C the most accurate

[참고] 정밀도와 정확도

[ https://ywpop.tistory.com/87 ]

student A: (14.8 + 14.2 + 14.5 + 14.7 + 14.3) / 5

= 14.5

---> 참값에 가장 가깝다.

---> A 학생의 정확도가 가장 높다(좋다).

---> the most accurate

student B: (14.7 + 14.8 + 14.9 + 14.8 + 14.8) / 5

= 14.8

---> 측정값들 사이의 차이가 가장 작다.

---> 즉, 측정값들이 한 곳에 모여 있다.

---> B 학생의 정밀도가 가장 높다.

---> the most precise

student C: (14.4 + 14.4 + 14.8 + 14.9 + 14.8) / 5

= 14.66

답: B. student B has done the most precise work and student A the most accurate

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