Q21. Based on 20 metropolitan areas in the United States, the relationship between the percentage living in poverty and annual murders per million is examined. Below is summary output of the least squares fit for predicting murders from poverty rates. (Constant) Poverty% Estimate -29.901 2.559 Std. Error 7.789 0.390 a. Test at the 5% significance level, against a two-sided alternative, the null hypothesis that that the slope of the population regression line is 0. b. Calculate a 95% confidence interval for the slope, and interpret it in context of the data. C. Do your results from the hypothesis test and the confidence interval agree? Explain.