Question

An object was weighed by a physical balance and following readings were obtained:5.04 g, 5.06 g, 4.97 g, 5.00 g, 4.93 g.Find:i. Mean value
ii. Mean absolute error
iii. Percentage error

Answer 1

Answer:

mean value=

5.06+5.04+4.97+5.00+4.93÷5

=5

mean absolute error=

5.06-5=0.06

5.04-5=0.04

4.98-5=-0.04

5.00-5=0

4.93-5=0.07

=|0.06|+|0.04|+|0.04|+|0|+|0.07|÷5

=0.156

percentage error

mean absolute error÷mean×100

0.154÷5×100

0.0308×100

3.08%