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?
A) Fail to reject the null hypothesis and conclude the mean stock price was $19.50.
B) Reject the null hypothesis and conclude the mean stock price was lower than $19.50.
C) Reject the null hypothesis and conclude the mean index was greater than $19.50.
D) Reject the null hypothesis and conclude the mean index was different from $19.50.

Question

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?
A) Fail to reject the null hypothesis and conclude the mean stock price was $19.50. 
B) Reject the null hypothesis and conclude the mean stock price was lower than $19.50. 
C) Reject the null hypothesis and conclude the mean index was greater than $19.50. 
D) Reject the null hypothesis and conclude the mean index was different from $19.50.

Quizplus · Accepted Answer

Reject the null hypothesis and conclude the mean index was different from $19.50.

The Printout Below Refers to the Weekly Closing Stock Prices