marijuana


  This data set is from US National Youth Survey reporting
  a repeated questionnaire on marijuana use of 237 teenagers
  yearly from ages 13 to 17 on an ordinal scale.


datasets

Likelihood-based marginal regression and association
modelling for repeated, or otherwise clustered, categorical
responses using dependence ratio as a measure of the
association

Jukka Jokinen

Regression and association models for repeated categorical data

marijuana function

This data frame contains the following columns:
<dl>
<dt>id</dt><dd>
identification number of a teenager.
</dd> <dt>y</dt><dd>
  marijuana response, 1: never;
  2: less than once a month; 3: more than once a month.
</dd> <dt>sex</dt><dd>
a factor with levels
<code>female</code> 
<code>male</code> 
</dd> <dt>age</dt><dd>
age as a factor with levels
<code>13</code> 
<code>14</code> 
<code>15</code> 
<code>16</code> 
<code>17</code> 
</dd> </dl> 

Format

Lang, JB, McDonald, JW, Smith, PWF. (1999). Association
  marginal modelling of multivariate categorical responses: A maximum
  likelihood approach. <em>JASA</em>, 94, 1161-1171.

marijuana: Longitudinal data set on teenage marijuana use

Description

Usage

Arguments

Format

Source

References