Last school year, the student body of a local university consisted

of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300

students taken from this year's student body showed the following number of

students in each classification.

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