Question

a teacher divides her class into groups and assigns each group the task of measuring the length of the same object 3 times.The teacher already knows the length of the object is 78.5 mm.
Based on the results the students record, which group makes the most accurate measurements of the objects?
A. group A: 78.5, 77.5,79.5
B. group D: 75.0, 75.0, 75.0
C. group C:78.5 mm,72.9,79.8 mm.
D. group B: 75.5 mm, 75.0 mm,74.8 mm.

Answer 1

group A

avg=$\frac{78.5+77.5+79.5}{3}$

avg=$\frac{235.5}{3}$

avg=78.5

Answer 2

Answer: Group

Explanation: I took the test.