exercise 8.25 presents regression output from a model for predicting annual murders per million from percentage living in poverty based on a random sample of 20 metropolitan areas. the model output is also provided below. (intercept) poverty% estimate -29.901 2.559 std. error 7.789 0.390 t value -3.839 6.562 pr(>|t|) 0.001 0.000 s