Question

U Question 12 5 pts Look at the following scatterplot. 3001 250 200 150 100 1 2 7 WWW Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. Or=0.95 Or.0.95 or=0.35 or -0.35 Question 13 5 pts Look at the following scatterplot. 800 700 600 500 100 200 Can you estimate the correlation coefficient (R) of the data shown in this scatterplot? Pick the best estimation from the options below. OR=0 OR=-1 OR-1 OR Does Not Exist

Answer 1

Question 12 Using the above graph the points falling from top to bottom hence there is strong negative correlation between the variables x and y 2nd option is correct reason 1st option r=0.95 (Wrong) Since the correlation of the graph is negative 2nd option : r=-0.95 (correct) Since it is negative and also strong>0.75) 3rd option:r=0.35 (wrong) Since the correlation of the graph is negative 4th option: r=-0.35 (wrong) Given correlation negative but week correlation <0.50)

Question 13 Since all data points are located along the graph hence there is no correlation between the variables x and y 1st option is correct Reason 1st option :R=0 (Correct) 2nd option : R=-1 (Wrong) If all points are falling from top to bottom (slant line) and points located at a straight line hence its strong negative correlation with r=-1 Son points are not in that way 2nd option : R=(Wrong) If all points are raising from bottom to top slant line) and points located at a straight line hence its strong positive correlation with r=-1 So points are not in that way 4th option: R does not exist(wrong) Ifx and y corresponding values are same then R does not exist Hence it is not correct