1. A survey conducted in 2015 by the health center at a university showed that 29% of the students smoked. In 2019, a new survey was conducted on a randome sample of 80 students from this university, and it was found that 22 of them smoke. We want to check whether these data provide evidence to suggest that the percentage of students who smoke has decreased over the four year period. Do the test at 19% signficance level. Select the tail type of this test.

1.Right tail

2.Left tail

3.Two tail

4.Center