Exercise 14-13 Algo In a simple linear regression, the following sample regression equation is obtained: y = 430 - 24x. a. Interpret the slope coefficient. O As x increases by 1 unit, y is predicted to decrease by 24 units. O As x increases by 1 unit, y is predicted to increase by 24 units. O As x increases by 1 unit, y is predicted to decrease by 430 units. O As x increases by 1 unit, y is predicted to increase by 430 units. b. Predict y if x equals -10.Exercise 14-55 Algo For a sample of 31 New England cities, a sociologist studies the crime rate In each city as a function of its poverty rate and its median income. He nds that SSE = 4.155.943 and SST= 2635.331. a. Calculate the standard error of the estimate. [Round your answer to 4| decimal places] h1. What proportion of the sample variation in crime rate is explained by the variability in the explanatory variables? [Round your answer to 4 decimal places] _ b2. What proportion is unexplained? [Round your answer to 4 decimal places.) IUriexnlalmdnromr-lim