About: This article walks through how to explore a "what if?" scenario on the Model subtab.
Table of Contents
Introduction
The “What If?” button on the Model Screen allows users to explore how the y-variable would be affected if one or more of the related variables were increased or decreased.
Select a Model / Model Variables
Explore “What If?” scenarios using any memorized model by selecting it from the Memorized Models list. The Model Equation window displays the established formula for the selected model. To perform a “What If?” analysis:
- Select any of the variables in the Model Variables window.
- Use the slider control to adjust its value.
The start value for any variable is its mean. The graph of the variable to the right will change to reflect the variable’s “new” mean as one or more a slider controls is repositioned. In the graph, the Original column is the predicted outcome based on all of the original values in the chart to the right of the columns. The Current column is the probability once those values have been changed.
Important: The "What If" analysis functionality makes assumptions regarding causalities in the data, and for this reason results could turn out to be much different than projected. When altering values in the "What If" analysis it is important to remember that the variable originally entered the model as a corollary relationship; assuming that a change in value will have a change in probability outcome, is assuming a causal relationship. Although this may be true, this assumption is worthy of additional consideration before being applied.
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