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Question: Angry people and heart disease 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 Spielberger Trait Anger Scale test, which measures how prone a person is to sudden anger. Here are data for the 8474 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.
Do these data support the study's conclusion about the relationship between anger and heart disease? Give appropriate evidence to support your answer.
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To qualify for security officers training, recruits are tested for stress tolerance. The scores are normally distributed with a mean of 62 and a standard deviation of 8. If only the top 15% of recruits are selected, find the cut-off score. What is..
1. Let X denote the mean of a random sample of size 100 from a distri bution that is x2(50). Compute an approximate value of Pr (49 X 51).
In1990, 5.8% ofjob applicants whowere testedfor drugsfailed thetest.
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