The overall purpose of statistics is to

a. make numbers meaningful.

b. identify the center of a distribution of numbers.

c. determine statistical significance.

d. discover how two variables are related.

d. discover how two variables are related.

Explanation:

Statistics: The term "statistics" is described as a form or types of a mathematical analysis that tends to use synopses, quantified models, and representations for a particular set of real studies or experimental data. Statistics tend to study the different methodologies to analyze, review, gather and draw conclusions from the given data.

One of the specific purposed of statistics is to determine the causal relationship between two different variables and to see the effect of one on another variable.

In the question above, option-d is correct.

answer; the president uses mass media to gain support for policies;