Problem 4 (for this problem you need to Porsche dataset) This problem is crucial for Test 2. Matilde took a sample of 30 used Porsche from the internet. [a] Graph the price of used Porsche and describe the graph. (Write about center; dispersion and shape) Note: Make sure you copy and paste a screenshot from statkey. [b] Compute the mean, standard deviation of price (use StatKey). Write a conclusion. (Hint: Matilde should write: The average price of Porsche is give or take . Note: After the give or take comes a typical value of uncertainty or dispersion which is the standard deviation.) [c] Now Matilde wants to use mileage to "explain\" price and also use age to \"explain\" price. She knows she must always graph rst. Make two scatterplots and describe both. (Hint: Remember that you must write about direction, form, strength of association and potential outliers.) Note: Make sure you copy and paste a screenshot from statkey. [(1] Next Matilde wants to compute a statistic in order to assess the strength of linear relationship. Compute for Matilde the correlation coefficient for both situations in part c and comment on the strength of linear association from the point of view of the graph and the correlation coefcient