Heart Attacks and Smoking
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Note: Assume the condition of Normality is met for problem below.
A study is made of men over the age of 50. Each man is classified as to whether or not he has had a heart attack and the amount that he smokes at the present time. The following results were obtained for a sample of 300 men.
Heart Attack
Amount smoked Yes No
None 50 150
Moderate 45 30
Heavy 15 10
At .05 significance level, is there a difference in the distribution of heart attacks based on the amount smoked?
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Solution Summary
The solution uses a chi-squared test to answer the question. A complete, step-by-step explanation of how to do the hypothesis test is provided. The hypothesis statement, critical value, test statistic, and conclusion are all stated explicitly.
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Note: Assume the condition of Normality is met for problem below. I also want to know the following elements: (Please do not use the Student t test or Chi-square test.) Two-tailed test
? Hypothesis statement H0: having a heart attack is independent of the amount smoked; H1: having a heart attack is not independent of the amount smoked
? Critical value X2 = 5.99
? Test statistic X2 = 35.167
? Conclusion We can reject the null hypothesis at the 0.05 level.
1. A study is made of men over the age of 50. Each man is classified as to whether or not he has had a heart attack and the amount that he smokes at the present time. The following results were obtained for a sample of 300 men.
Heart Attack
Amount smoked Yes No
None 50 150
Moderate 45 30
Heavy 15 10
At .05 significance level, is there a difference in the distribution of heart attacks based on the amount smoked?
H0: No ...
Purchase this Solution
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