Marion Hughes Sociology 391 Spring 2011
Q. 110: How many days out of the past 30 have you used marijuana? 0 1-5 6-10 21+ Recoded into 3 ordinal categories: 0 1-5 6 +
Q14. Please indicate the range that best categorizes your current cumulative grade point average. Don’t have one 2.50 or less 2.51 – – or higher Recoded into three ordinal categories: 2.67 or less 2.68 – or higher
Students who use marijuana will have lower GPAs than students who do not. The frequency of marijuana use is negatively related to cumulative grade point average.
X 2 = 2.177, df = 4, p <.703
No statistically significant relationship between marijuana use and GPA My hypothesis is not supported
Q What is your sex? female male Hypothesis: Controlling for sex, the frequency of marijuana use is negatively related to cumulative grade point average.
X 2 = , df =4, p <.028 Cramer’s V =.235
Moderately strong, statistically significant relationship between marijuana use and GPA However, my hypothesis is not supported The occasional users (1-5 times a month) have the lowest GPAs 17.3% more of the women who used 6+ times last month have GPAs above 3.5 than women who never used
X 2 = 3.023, df = 4, p <.554
No statistically significant relationship Hypothesis not supported
Hypothesis not supported by the data Specification: significant relationship only exists for women, although not in the predicted direction
Shortcomings: time order of variables Further research Legalization of marijuana