Using the "alcohol use across years in college" data set, evaluate whether participants changed significantly form year to year in terms of the number of days drinking to get drunk (in the last month). These are variables drunk1 through drunk4. This analysis is identical to the example in the video examining differences in drinking days across year in college. Do the following:

1. Conduct the appropriate t tests to evaluate changes in drinking to get drunk across years (these are repeated assessments).
   1. State the null and alternative hypotheses.
   2. Cut/paste relevant SPSS output.
   3. State your conclusion for each comparison.
   4. Report effect size (Cohen's d) for each comparison.
2. bar graph that shows the mean levels across years.
3. Extra credit: brief summary explaining the pattern of differences (or non-differences) that you found. What might be going on that explains the changes in getting drunk across these years?