Coronary Heart Disease in British Male Physicians A Probability Assessment Assessment

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Probability Assessment of Coronary Heart Disease in British Male PhysiciansIn 1985, Breslow performed research investigating the mortality rates due to coronary heart disease among British male doctors, categorizing them by their smoking behavior (as cited in Hand et al., 1994). The gathered data is shown in the following table.Age, smoking, and heart disease in a sample of male physiciansAge (in years)NonsmokersSmokers35-4423245-541210455-642820665-742818675-8431102Using the data, we can answer the following questions:Question 1: How many doctors were surveyed?To calculate the entire number of doctors examined, we add the number of nonsmokers and smokers for every age category:Total = (2 + 32) + (12 + 104) + (28 + 206) + (28 + 186) + (31 + 102)Total = 34 + 116 + 234 + 214 + 133Total = 731A total of 731 doctors were examined.Question 2: How many of these doctors reported that they smoked? How many reported that they did not smoke?To determine the number of doctors who smoked and those who did not, we combine the figures in the corresponding columns:Nonsmokers = 2 + 12 + 28 + 28 + 31 = 101Smokers = 32 + 104 + 206 + 186 + 102 = 630Among the examined doctors, there were 101…

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…34 ? 0.9412The probability that an individual who died from coronary heart disease aged between 35 and 44 was a smoker is roughly 0.9412.

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Question 4: What is the probability that someone who died of coronary heart disease between the ages of 75 and 84 was a smoker?P(Smoker | 75-84) = 102 / (31 + 102) = 102 / 133 ? 0.7669The probability that an individual who died from coronary heart disease aged between 75 and 84 was a smoker is roughly 0.7669.Question 5: At what age range from the table above is smokers the highest proportion of those who died from….....

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