One-way ANOVA and Test of Linearity

A public health researcher is studying smoking addiction in young people. He believes the data will show that heavier smokers began smoking at a younger age than lighter smokers and is especially interested to know if the association is linear.

This example uses the file smokers.sav. See the topic Sample Files for more information. The data, from the National Household Survey of Drug Abuse, are a probability sample of American households. The first step will be to weight the data to reflect population trends.

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