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.
Massive sea surges triggered by an earthquake under the Indian Ocean have killed over 10,000 people in southern Asia, with many more feared dead. An 8.9 magnitude earthquake under the sea near Aceh, north Indonesia, at 0759 local time (0059 GMT) generated the biggest tsunami the world has seen for at least 40 years. The wall of water fanned out across the Indian Ocean at high speed and slammed into coastal areas with little or no warning.