Below are four bivariate data sets and the scatter plot for

Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population.

Each answer is either the X,Y data set, U,V data set, W,T data set or the M,N data set. Question 3 also has None of the above data set.

Solution

(1) W, T data set

because rest other plots approximates to a line for which r become closer to +1 or -1. But, W, T data set is completely scattered.

(2) U,V data set

becuase a straight line fits best in this case.

(3) M,N data set

because the straight line fitted will have a positive slope.

(4) U,V data set

because the fitted straight line will have a negative slope.