Air pollution 4.5 0.7 8.2 5.0 4.6 6.1 3.0 index Emergency 53 82 102 60 39 42 27 admissions a. Taking the air pollution index as an independent variable and the number of emergency admissions as a dependent variable, do you expect B to be positive or negative in the regression modely =A + Bx+ e? b. Find the least squares regression line. Is the sign of b the same as you hypothesized for B in part a? ". Compute y and r, and explain what they mean. d. Compute the standard deviation of errors, e. Construct a 90% confidence interval for B. I. Test at a 5% significance level whether B is positive. g. Test at a 5% significance level whether p is positive. Is your conclusion the same as in part f