8th grade science?

Question

a group of students each measured the mass of a large paperclip on a mass balace.

jacob's mass is 1.02

scotts's mass is 0.99

maddy's mass is 0.97

alyssa's mass is 0.98

1. what is the error in jacobs measurement?

a. zero

b. 0.02

c. 0.03

d. 0.005

2.what is the most accurate measurement?

a. jacob

b. scott

c. maddy

d. alyssa

Answer 1

(1.02 + 0.99 + 0.98 + 0.97)/4 = 0.99

1. 1.02 - 0.99 = 0.03

2.

b. scott

However, any of the measurements could have been the most accurate.  There is no guarantee that the average is the true measurement.  The standard deviation is 0.01870829, and the error of the mean is 0.009354143