marijuana use & academic achievement
DESCRIPTION
Marijuana Use & Academic Achievement. Marion Hughes Sociology 391 Spring 2011. Independent Variable: Marijuana Use. Q. 110: How many days out of the past 30 have you used marijuana? 0 1-5 6-10 11-15 16-20 21+ Recoded into 3 ordinal categories: - PowerPoint PPT PresentationTRANSCRIPT
Marijuana Use & Academic
AchievementMarion HughesSociology 391
Spring 2011
Q. 110: How many days out of the past 30 have you used marijuana?
0 1-5 6-10 11-15 16-20 21+
Recoded into 3 ordinal categories: 0 1-5 6 +
Independent Variable: Marijuana Use
Q14. Please indicate the range that best categorizes your current cumulative grade point average. Don’t have one 2.50 or less 2.51 – 2.67 2.68 – 3.50 3.51 or higher
Recoded into three ordinal categories: 2.67 or less 2.68 – 3.50 3.51 or higher
Dependent Variable: Cumulative GPA
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.
Research hypothesis
X2 = 2.177, df = 4, p <.703
Method: contingency table
No statistically significant relationship between marijuana use and GPA
My hypothesis is not supported
Bivariate results
Q. 204. What is your sex? female male
Hypothesis: Controlling for sex, the frequency of marijuana use is negatively related to cumulative grade point average.
Control variable: Sex
Females
X2 = 10.910, df =4, p <.028Cramer’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
Results for females
Males
X2 = 3.023, df = 4, p < .554
No statistically significant relationship
Hypothesis not supported
Results for males
Hypothesis not supported by the data
Specification: significant relationship only exists for women, although not in the predicted direction
Outcome of elaboration
Shortcomings: time order of variables
Further research
Legalization of marijuana
Implications