Description

The National Youth Survey collected a sample of 11 to 17 year olds - 117 boys and 120 girls - asking questions about marijuana usage.

Usage

Format

A data frame with 486 observations on the following 7 variables.

sex

1=Male, 2=Female

year.76

1=never used, 2=used no more than once a month, 3=used more than once a month in 1976

year.77

1=never used, 2=used no more than once a month, 3=used more than once a month in 1977

year.78

1=never used, 2=used no more than once a month, 3=used more than once a month in 1978

year.79

1=never used, 2=used no more than once a month, 3=used more than once a month in 1979

year.80

1=never used, 2=used no more than once a month, 3=used more than once a month in 1980

count

Number of cases in this category

Source

ICPSR, University of Michigan

References

Lang J., McDonald, J and Smith P. (1999) "Association-Marginal Modeling of Mutlivariate Categorical Responses: A Maximum Likelihood Approach" JASA 94, 1161-