Question

Researchers were interested in assessing whether high school GPA is associated with graduating from college in 4 years. At graduation, a group of 5,000 college students were assessed to determine who completed their degree in 4 years compared to those who completed their degree in more than 4 years. In total, 2800 students completed their degree in 4 years. At the same time, students were asked about their high school GPA. Of the students surveyed, 1,500 had a GPA < 3.0 in high school, of whom 600 graduated in 4 years. What type of study was conducted? Create a 2x2 table comparing high school GPA and graduating in 4 years versus those who did not graduate in 4 years. Calculate the prevalence odds ratio and interpret your findings in a sentence. Is high school GPA associated with graduating in 4 years? (Hint: your outcomes is high school graduation in 4 years, yes vs no)

Answer 1

Study conducted is a type of a correlation between the different predictors ( 4 predictors are there : High School GPA < 3.0, High School GPA > 3.0, No of students completed degree in 4 years, No of students who did not complete degree in 4 years)

	Completed degree in 4 Years	Did Not complete degree in 4 Years
High School GPA > 3.0	2200	1300
High School GPA < 3.0	600	900

Yes, high school GPA is associated with graduating in 4 years.

78.5% of students who had High School GPA > 3.0 completed their degree in 4 years. Whereas only, 21.4% of students who had High School GPA <3.0 completed their degree in 4 years.

40.9% of students who had High School GPA < 3.0 did not complete their degree in 4 years. 59% of students who had High School GPA > 3.0 did not complete their degree in 4 years.