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Qualatative & Quantitative Research Methodology

These time points permitted an assessment of recent historical trends in public opinion toward the legalization of marijuana use.

The data collected were controlled for (1) respondent gender, (2) respondent ethnic/racial background, and (3) respondent age. These controlling variables facilitated interpretation of identified trends, and the projection of future trend movements.

Population and Sample, andData Collection

This study relied on secondary data. The required data were collected, reported, and published by the United States Department of Justice, Bureau of Justice Statistics (1987). The data were collected by the National Opinion Research Center. The data used in this study were collected through the conduct of national probability sampling polls (Bureau of Justice Statistics, 1987). Both cluster and strata procedures are included in the sampling process. Sample sizes relevant to the data used in this study were as follows:

1. The 1973 sample included 1,504 persons, while the 1975 sample included 1,490 persons, and the 1976 sample included 1,499 persons. All provided a 95 percent confidence level.

2. The 1978 sample included 1,532 persons, while the 1980 sample included 1,460 persons, and the 1983 sample included 1,599 persons. All provided a 95 percent confidence level.

3. The 1984 sample included 1,473 persons, while the 1986 sample included 1,470 persons, and the 1987 sample included 1,466 persons. All provided a 95


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