Ipromise to give brainliest no ! plz if i get the answers i will have an a in my class ive been asking all this week i beg plzz someone answer what measures of center and spread are best used if the data is symmetrical and asymmetrical? explain your reasoning. what are the different shapes of a data set? explain left and right skew and how this affects the mean of a data set. what is the line of best fit? why do we want the sum of the residuals to be as close to zero as possible? how can you tell if data have outliers? what is the difference between joint and marginal frequency? what do the values of the correlation coefficient tell us? provide an example. what is the difference between correlation and causation? what makes causation difficult to prove?