Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 400 students taken from this year's student body showed the following number of students in each classification.

Freshmen113Sophomores98Juniors115Seniors74

We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. The calculated value for the test statistic equals

Select one:

a.

.54.

b.

.65.

c.

2.063.

d.

2.664.