One company would like to test the effect of ingesting marijuana on course grades.
They samples 200 random Baruch students and either has them drink 2 cups of either regular or decaf coffee every day for a whole semester.
At the end of the semester, she found that in the Regular Coffee group, 79 out of 100 passed all their courses, and in the Decaf Coffee group, 58 out of 100 passed all their courses.
What statistical method(s) will I need to use, and why?
I need any important values such as test statistics, p-values etc, I need a clear explanation of the calculation manually and in excel
What is the conclusion ?