The average daily cost of living in dollars (x) and the average wage in dollars (y) in 12 regions of a country are shown in the following table. 82 81 83 81 88 106 66 91 74 87 76 118 131 150 139 154 161 193 140 159 147 158 162 173 Assume that the averages are jointly normally distributed. Use the z-values rounded to two decimal places to obtain the answers. (a) Find a regression line relating the wage to the cost of living. Round your answer to one decimal place (e.g. 98.7). Bo = 1 (c) Estimate the correlation coefficient Round your answer to three decimal places (e.g. 98.765). Round your answer to two decimal places (e.g. 98.76). i Bi= i (f) Construct a 90% confidence interval for the correlation coefficient. Round your answers to three decimal places (e.g. 98.765). i SPS