Sample of 654 youths, aged 3 to 19, in the area of East Boston during middle to late 1970's. Interest concerns the relationship between smoking and FEV. Since the study is necessarily observational, statistical adjustment via regression models clarifies the relationship.

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A data frame with 654 observations on the following 5 variables.

`age`

a numeric vector

`fev`

a numeric vector

`ht`

a numeric vector

`sex`

a numeric vector

`smoke`

a numeric vector

Kahn M (2005). An Exhalent Problem for Teaching Statistics. The Journal of Statistical Education, 13(2).

Rosner, B. (1999), Fundamentals of Biostatistics, 5th Ed., Pacific Grove, CA: Duxbury.

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