Last school year, the student body of a local university consisted of 30 freshmen, 24 sophomores, 26 ...

Last school year, the student body of a local university consisted of 30 freshmen, 24 sophomores, 26 juniors, and 20 seniors. A random sample of 300 students taken from this year's student body showed the following number of students in each class. Freshmen 83 Sophomores 68 Juniors 85 Seniors 64 We are interested in determining whether there has been a significant change in the distribution of class between the last school year and this school year. The null hypothesis _____.
 a. should not be rejected
  b. should be rejected
  c. was designed wrong
  d. None of the answers is correct.