can someone explain how to solve this step by step?

Question

Cans of regular soda have volumes with a mean of
13.39
13.39 oz and a standard deviation of
0.12
0.12 oz. Is it unusual for a can to contain
13.61
13.61 oz of soda

Answer 1

Obtain a z-chart

http://www.stat.ufl.edu/~athienit/Tables/Ztable.pdf

z = (X - μ) / σ

z = (13.61 - 13.39) / 0.12

z = 0.22 / 0.12

z = 1.833

 

What do you say?