GMAT Question Analysis #2

Posted on October 10, 2012 by Anthony Ritz

Today’s question comes from the GMAT. It’s Critical Reasoning Practice Question #7 in The Official Guide for GMAT Verbal Review, 2nd Edition (page 118).

A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

The researcher’s conclusion depends on which of the following assumptions?

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Correlation Doesn’t Imply Causation (But It Does Waggle Its Eyebrows Suggestively and Gesture Furtively While Mouthing “Look over There”)

Posted on July 9, 2012 by Anthony Ritz

Well, this weekend in my private tutoring ended up being all about correlation/causation issues, and I feel like sharing, so here you go:

The issue of correlation versus causation shows up on the LSAT, the GMAT, and the GRE, among other standardized tests. It’s a good idea to start by trying to understand correlation and causation generally. We’ll look at specific examples/applications and a full question analysis towards the end.

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