Consider the following to answer questions
Vending machines on a college campus offer a variety of drinks.The purchasing agent
believes that each type of drink is equally preferred by students and consequently orders
equal quantities.The number of drinks sold from vending machines on this campus for
the last six months is shown in the following table.
-The degrees of freedom associated with the test statistic are
A)1.
B)2.
C)3.
D)4.
E)None of the above.

Question

Consider the following to answer questions 
Vending machines on a college campus offer a variety of drinks.The purchasing agent
believes that each type of drink is equally preferred by students and consequently orders
equal quantities.The number of drinks sold from vending machines on this campus for
the last six months is shown in the following table. 
-The degrees of freedom associated with the test statistic are
A)1. 
B)2. 
C)3. 
D)4. 
E)None of the above.

Quizplus · Accepted Answer

To calculate the degrees of freedom for a chi-square test, we subtract 1 from the number of categories. In this case, there are 4 categories (Coke, Pepsi, Sprite, and Other), so the degrees of freedom would be 4-1=3. Therefore, the answer is C) 3.

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