The printout below refers to the weekly closing stock prices for Air Canada on 20 randomly selected weeks in 2000. 
Using a 5% level of significance, can you say that the average Air Canada stock price was different from $19.50?
Definitions:
Salter-Harris Type
A classification system used to describe fractures involving the growth plate (physis) in children.
Physeal Fracture
A break in the growth plate of a bone, typically seen in children and adolescents.
Upper End
Refers to the topmost or highest part of something.
Right Femur
The thigh bone located on the right side of the body, which is the longest and strongest bone.
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