Dr. J's Maths.com
Where the techniques of Maths
are explained in simple terms.

Statistics - bivariate - correlation.
Test Yourself 1.


Variables involved What is the best description between the steady increase in house values and a year 12
student’s success in the HSC?
(A) Zero correlation.
(B) Positive correlation.
(C) Constant correlation
(D) Negative correlation.
Graphical representation.  
Interpretation of  

About 6 weeks after the Astra-Zeneca vaccine was introduced into Europe to help combat Covid-19 infections, its use was suspended. It was feared that the vaccine was causing blood clots in those who were receiving it. Of the 17 million people who had been injected, 38 had developed blood clots so people inferred there was an association between the two observations.

Explain the difference in this case between causation and association and how the difference apples here.