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Visual Analytics - An Interaction of Sight and Thought - JMP

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Predictions rely on statistical models.<br />

Don’t let the terms statistical model or predictive model throw you. In concept, they’re<br />

quite simple, just like more familiar models <strong>of</strong> other types. Generally speaking, models<br />

are representations <strong>of</strong> things or events, which we use to examine <strong>and</strong> underst<strong>and</strong> those<br />

things or events when it isn’t possible or practical to observe or interact with them<br />

directly. Statistical models represent mathematical relationships between the parts that<br />

make up the thing or event. Predictive models are those that we can interact with to<br />

investigate the results <strong>of</strong> hypothetical conditions, such as by changing the values <strong>of</strong><br />

particular variables.<br />

Predictive models make it possible for us to do what some people call what-if analysis.<br />

What if such <strong>and</strong> such a condition existed or event occurred? What would happen as a<br />

result? Predictive models give us the means to predict what would probably happen<br />

(the probable outcomes <strong>of</strong> dependent variables) if particular conditions arose naturally<br />

or by intention (specified input values to one or more independent variables).

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