A Study Is Conducted to Assess the Relationship Between Smoking

A study is conducted to assess the relationship between smoking status and forced expiratory volume in one second (FEV₁) .  Subjects are randomly selected and categorized based on smoking status.  Group A consists of 200 nonsmokers, group B consists of 200 light smokers (1-7 cigarettes per day) , group C consists of 200 moderate smokers (8-22 cigarettes per day) , and group D consists of 200 heavy smokers (23+ cigarettes per day) .  FEV₁ is quantitatively measured in all participants using properly calibrated office spirometers.  Which of the following is the most appropriate statistical method to compare the mean FEV₁ results among all 4 groups?

A) Analysis of variance
B) Chi-square test
C) Meta-analysis
D) Multiple logistic regression
E) Pearson correlation coefficient
F) Two-sample t-test

Correct Answer:

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