In a study on the effect of diet and lifestyle on heart disease, 96 patients with severe coronary blockage were randomly assigned, 49 to an experimental group and 47 to a control group. The patients in the experimental group had a low-fat vegetarian diet, regular exercise, and stress-management training, whereas those in the control group had a low-fat diet and moderate exercise. The condition of their coronary blockage was monitored throughout the study period, and the following results were noted.

Are attitude toward the proposal and gender associated?

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Coronary Blockage Group Worsened No Change Improved Total Experimenta4 Control 7 49 14 47 25 96