As an independent project,a team of statistics students tabulated the types of vehicles that were parked in four different suburban shopping malls. For a chi-square test of independence,degrees of freedom would be:
A) 20.
B) 12.
C) 399.

Question

As an independent project,a team of statistics students tabulated the types of vehicles that were parked in four different suburban shopping malls.  For a chi-square test of independence,degrees of freedom would be:
A) 20. 
B) 12. 
C) 399.

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test of independence is calculated by (number of rows - 1) multiplied by (number of columns - 1). Since we do not know the exact number of rows and columns in the table, we cannot determine the degrees of freedom with certainty. However, based on the information given in the question, we can assume that there are at least 2 types of vehicles and 4 shopping malls, which would give us (2-1) x (4-1) = 3 degrees of freedom. Therefore, the best choice is B, 12, which is the closest value to 3 among the given options. Choice A, 20, is too high and Choice C, 399, is too low.

As an Independent Project,a Team of Statistics Students Tabulated the Types