Use the following information to answer questions 17 and 18: In the United State
ID: 3244518 • Letter: U
Question
Use the following information to answer questions 17 and 18: In the United States, there is a strong relationship between smoking and education, with well-educated people less likely to smoke. A study in France included a sample of 459 men who were selected at random from men who had visited a health center for a routine checkup. Education is classified into three categories corresponding to the highest level of education and smoking status is classified into four categories. Suppose we wish to test the null hypothesis that there is no association between education level and smoking status. Under the null hypothesis, the expected number of nonsmokers with a primary school education is a. 42.37. b. 50.93. c. 59.48. d. 62.34. The degrees of freedom for the chi-square test for this two-way table are a. 2. b. 6. c. 7. d. 12. In a statistical test of hypotheses, we say the data are statistically significant at level alpha if a. the P-value is larger than alpha. b. the P-value is less than alpha. c. alpha = 0.20. d. alpha is greater than 1.Explanation / Answer
Q.17
Expected Number of non smokers with aa primary school education = (146 * 187)/ 459 = 59.48
Q.18 Degrees of Freedom = (3-1) * (4-1) = 2 * 3 = 6
Q.19 If p- value is less than alpha then data are statistically significant.