Andrew M. answered • 09/18/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
The mean is the arithmetic average.
Add the numbers and divide by how many data points.
(43+30+56)/3 = 129/3 = 43 cm initial mean
(43+15+15+56)/4 = 129/4 = 32.25 cm new mean
Katherie Y.
09/18/17