Word: variablesã
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...Studies may have found corollary evidence linking violent games to violent behavior, but, as anyone who has taken even the most basic statistics class can remind us, correlation does not equal causation, and there is no convincing evidence of a causal effect here. There are simply too many lurking variables??socially awkward teenagers may play violent video games, but so do many perfectly happy teens. We cannot prove that playing the games somehow morphs teens into serial killers...
...began in 1976 with 121,700 women. The second, the Nurses’ Health Study II, began with 116,671 in 1989. The two studies were observational, relying on participants to self-report data about their health and breast-feeding habits. Michels acknowledged that “confounding variables??—other influences that can lead to false conclusions—are always a concern in observational research. She said, though, that she was confident in the integrity of her conclusions. “We controlled for lifestyle factors—a fairly large number of variables...
Shieber’s students canvassed over 10 years of data—historic enrollment, course type, department, CUE guide ratings, time slot, and other variables??to determine an algorithm, which Shieber called a “machine learning system?...
...student was so enthusiastic after Summers showed his fifth-grade class how to plot the relationship between two variables??grades and number of days absent, growth of a plant and amount of sunlight and height and weight—that the student pulled Summers by the arm over to the blackboard and showed him a “tree graph...
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