Correct Answer (a) State: We want to perform a test of Smoking status and education are independent among French men aged 20 to 60 H0: Smoking status and education are not independent among Ha: at the = 0.05 level. Plan: Use a chi-square test for association/independence if the conditions α are satisfied. The data came from a random sample. Large sample size in which the Random: expected counts are 59.48, 50.93, 42.37, 34.22, 44.21, 37.85, 31.49, 25.44, 42.31, 36.22, 30.14, 24.34. All these counts are at least 5. There are at least 4590 French men aged 20 to Independent: 60. Do: The test statistic is = 13.305 and the is 0.0384 using df = 6. Conclude: Since P-value χ2 the is less than 0.05, we reject and conclude that education and smoking status P-value H0 among French men aged 20 to 60 are not independent. (b) The largest contribution is from the university-educated males who are heavy smokers—there are far fewer of them than expected.
Correct Answer (a) State: We want to perform a test of H0: Smoking status and education are independent among French men aged 20 to 60 Ha: Smoking status and education are not independent among at the α = 0.05 level. Plan: Use a chi-square test for association/independence if the conditions are satisfied. Random: The data came from a random sample. Large sample size in which the expected counts are 59.48, 50.93, 42.37, 34.22, 44.21, 37.85, 31.49, 25.44, 42.31, 36.22, 30.14, 24.34. All these counts are at least 5. Independent: There are at least 4590 French men aged 20 to 60. Do: The test statistic is χ2 = 13.305 and the P-value is 0.0384 using df = 6. Conclude: Since the P-value is less than 0.05, we reject H0 and conclude that education and smoking status among French men aged 20 to 60 are not independent. (b) The largest contribution is from the university-educated males who are heavy smokers—there are far fewer of them than expected.