1. 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%, do the students' grades this year have the same distribution as their year-old student scores. the previous year, using the 5% significance level? (weights 50)


2. The following is the consumer data for XYZ airline users

Type of Ticket	Type of Flight
	Domestic	International
First-class	29	22
Business/executive class	95	121
Full fare economy	518	135

Use α = 0.05
Is there a difference between the flight type and the ticket type? (weight 50)