There is a clear trend: as the anger score increases, so does the percent who suffer heart disease. Is this relationship between anger and heart disease statistically significant? Show all your work. Include the null and alternative hypotheses, significance level, critical values from the chi-square distribution with degrees of freedom, chi-square test statistic, p-value, conclusion from the test, conclusion stated in context of the stated problem. Anger Score Low Moderate High Total CHD 53 110 27 No CHD 3057 4611 606 Total
People who get angry easily tend to have more heart disease. That's the conclusion of a study that followed a random sample of 12,986 people from three locations for about four years. All subjects were free of heart disease at the beginning of the study. The subjects took the Speilberger Trait Anger Scale, which measures how prone a person is to sudden anger. Here are data for the 8464 people in the sample who had normal blood pressure. CHD stands for "coronary heart disease." This includes people who had heart attacks and those who needed medical treatment for heart disease.
There is a clear trend: as the anger score increases, so does the percent who suffer heart disease. Is this relationship between anger and heart disease statistically significant? Show all your work. Include the null and alternative hypotheses, significance level, critical values from the chi-square distribution with degrees of freedom, chi-square test statistic, p-value, conclusion from the test, conclusion stated in context of the stated problem.
| Anger Score |
| Low | Moderate | High | Total | |
| CHD | 53 | 110 | 27 | |
| No CHD | 3057 | 4611 | 606 | |
| Total |
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