Case 3.

In the Statistics exam, 100 students got the following scores:
25 people got an A
30 people got a B grade
20 people got a C
20 people got a D
8 people got an E

If in previous years, students who scored A was 30%, B was 20%, C was 35%, D was 7% and E was 8%.

Questions:

Do the students\' grades this year have the same distribution as the student before them in many of the previous year, using the 5% significance level?