A group of professors investigated first-year college students' knowledge of astronomy. One concept of interest was the Big Bang theory of the creation of the universe. In a sample of 144 freshmen students, 31 believed that the Big Bang theory accurately described the creation of planetary systems. Based on this information, is it correct at the a = 0.10 level of significance to state that more than 20% of all freshmen college students believe the Big Bang theory describes the creation of planetary systems?
Find the test statistic
Z=
Determine the rejection region
Z<-1.645
Z>1.28
Z>1.28 or Z<-1.28
Z<-1.645
Z>1.645 or Z<-1.645
Z>1.645