8) Regression methods were used to analyze the data from a study investigating the relationship between roadway surface temperature (x) and pavement deflection (y). Data were as follows; 240 181 193 155 172 110 113 75 94 x 1.6 9.4 15.5 20.0 22.0 35.5 43.0 40.5 33.0 a) Calculate Zy , Ex , Ev , Ex and Evi *; b) Calculate the least square estimates of the slope and intercept. c) Write down your model and the estimate of of Your solution for this question should start from one line below