Part II Remember to show all work for computation problems - you will not receive full credit without it! (Computations for SS, s2 and s may be done on your calculators without showing the work.) 13. A researcher was interested in whether there was a relationship between poverty and violent crime in the United States. He finds the percentage of people living in poverty for a sample of 22 states, as well as the number of violent crimes committed each year in those states. Use the summary statistics below to answer the questions: Descriptive Statistics Mean Std. Deviation N Average % Living in 11.95 2.99 22 Poverty Violent Crime 356.69 191.31 22 EXY = 101789.61 a) What is the value of Pearson's r? (2 pts) What size correlation is this? (1 pt) b) What is the null hypothesis (in symbols)? If we wanted to test for significance, assuming a = .05, two tailed, what is the rev (the critical value for rejecting r)? Can we reject the null and what does that mean for this study (be specific with the variables)? (3 pts)