Question 495039: In a study of childhood asthma, 4,317 observations were collected on education and smoking
during pregnancy, shown in the 4 × 3 contingency table below. Research question: At α = .005,
is smoking during pregnancy independent of education level? (Data are from Michael Weitzman
and Deborah Klein Walker, “Maternal Smoking and Asthma,” Pediatrics 85, no. 4 [April 1990],
p. 507.)Education No Smoking <12
Pack ≥12
Pack Row Total
High School 1,370 290 270 1,930
Some College 635 68 53 756
College 550 30 18 598
Col Total 3,196 584 537 4,317
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In a study of childhood asthma, 4,317 observations were collected on education and smoking
during pregnancy, shown in the 4 × 3 contingency table below. Research question: At α = .005,
is smoking during pregnancy independent of education level? (Data are from Michael Weitzman
and Deborah Klein Walker, “Maternal Smoking and Asthma,” Pediatrics 85, no. 4 [April 1990],
p. 507.)Education No Smoking <12
Pack ≥12
Pack Row Total
High School 1,370 290 270 1,930
Some College 635 68 53 756
College 550 30 18 598
Col Total 3,196 584 537 4,317
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Ho: row and column factors are independent
Ha: row and column factors are not independent
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I ran a Ch-Sq program on the 3x3 set of data and got the following:
test stat: Chi-Sq = 139.78
p-value: 3.15x10^-23
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Conclusion: Since the p-value is less than 0.5%
reject Ho. The test does not support independence
of the row and column factors.
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Cheers,
Stan H.
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