I liked this article, and it nicely demonstrates the concept of âcontrolling for other variablesâ (IQ, career, income, age, etc) in order to best isolate the true relationship between just the 2 variables in question.t also should be noted that controling for other variables does only make sense when the explanatory variables are moderately correlated (collinearity). In the aforementioned example, the Product-Moment correlation between exposure and covariate is 0.50, i.e. 2.
In Indonesia, at least 3,000 of the dead were in Banda Aceh, the capital of Aceh province, and officials said the death toll was likely to rise. Communication with many coastal areas was impossible, and the extent of the damage there remained uncertain.
This unleashed a series of killer waves across the Indian Ocean that traveled as fast as a jet airliner. The 9.0 magnitude earthquake was the largest magnitude earthquake in 40 years and the tsunami it generated traveled as much as 3,000 miles to Africa. About 229,866 were found dead and one-third of the death toll were young children who were not strong enough to fight against the force of the waves.