Necessary and Sufficient assumptions all fall in the Strengthening question types. The deleted user is my friend who I studied with and we both were tutored by Testmasters. Every company teaches it differently. FYI
... in the world-it’s data
Co-Variance: Change ...
A lot of data points—the runner/people who ... “third” cause
(3) Data Set- Competing or corroborating sets ... - competing data or corroborating data
**Correlation means ...