CHAPTER 14
Inference for Categorical Data: Chi-Square
The owner of a small manufacturing business is attempting to determine whether accidents are more
likely during a particular shift. The same number of employees work during each shift, and the
number of accidents that have occurred during each shift since the company opened are recorded in
the table.
How many degrees of freedom are required for the appropriate chi-square test?
(A) 2
(B) 3
(C) 64
(D) 65
(E) 66
A random sample of 150 students was taken at a large high school. Among other things, students
were asked their gender and their eye color. The data are summarized in the table.