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.

Solution

1.

MN data set.

Negative linear relationship gets lower from left to right, and the MN set looks almost perfectly linear.

2.

There is no such set.

UV data set has strong positive linear relationship, but it\'s not perfectly linear.

3.

WT data set.

As you can see, a trend is there, but it is a parabola, not a line.

4.

UV data set.

It goes up from left to right, hence, a positive linear relationship.