A summary measure called the correlation describes the strength of the linear association. Correlation summarizes the strength and direction of the linear (straight-line) association between two quantitative variables. Refer to the following data and then answer the following - x = Cigarettes smoked per day = [ 4, 5, 8, 10, 11] y = Years lived = [50, 48, 45 , 42, 41] What is the value of the Pearson's correlation coefficient?