Is the national crime rate really going down? Some sociologists say yest They say that the reason for the decine in crime rates in the 1980s and 1990s is demographics. t seems that the population is aging, and oider people commi fewer crimes According to the FRI and the Justice Department, 70% of all arrests are of males aged 15 to 34 yearst. Suppose you are a sociologist in Rock Springs, Wyoming, and a random sample of police fies showed that of 37 arrests last month, 25 were of males aged 15 to 34 years. Use a 1% level of significance to test the claim that the population preportion of such arrests in Rock Springs is different from 70%. (a) What is the level of significance? State the null and altermate hypotheses. OHo p<0.7; Hip-0.7 O Hoi P-0.7; N:p>0.7 O Mo p0.7; Hp-0.7 (b) What sampling distribution will you use? The standard normal, since np 5 and ngS. The Student's t, sirice np > S and ng S. S. O The Student's t, since np
