The sequential sums of squares represent the conditional contribution of each of the predictor variables given the variables already in the model. Use the following partial output generated using MINITAB to determine which predictor variable accounts for the largest proportion of the total variation explained by the regression model. What is the proportion accounted by the selected variable? 
Definitions:
Locus of Control
A psychological concept that refers to how strongly people believe they have control over the situations and experiences that affect their lives.
Problem-Focused Coping
Problem-focused coping involves directly addressing a problem causing stress in order to reduce or eliminate it.
General Adaptation Syndrome
A theoretical model describing the body's short-term and long-term reactions to stress, proposed by Hans Selye, comprising stages of alarm, resistance, and exhaustion.
Alarm Reaction
describes the initial response of the body to stress, involving the activation of the sympathetic nervous system and release of stress hormones.
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