Does going to university in a different country affect your mental health? A Japanese international university surveyed its students in 2018 and published a study the following year that was approved by several ethical and regulatory boards.
The study found that international students have a higher risk of mental health difficulties than the general population, and that social connectedness (belonging to a social group) and acculturative stress (stress associated with joining a new culture) are predictive of depression.
Explore the students data using PostgreSQL to find out if you would come to a similar conclusion for international students and see if the length of stay is a contributing factor.
Here is a data description of the columns you may find helpful.
| Field Name | Description |
|---|---|
inter_dom | Types of students (international or domestic) |
japanese_cate | Japanese language proficiency |
english_cate | English language proficiency |
academic | Current academic level (undergraduate or graduate) |
age | Current age of student |
stay | Current length of stay in years |
todep | Total score of depression (PHQ-9 test) |
tosc | Total score of social connectedness (SCS test) |
toas | Total score of acculturative stress (ASISS test) |
-- Run this code to view the data in students
SELECT *
FROM students;--Return a table with nine rows and five columns.
--The five columns should be aliased as: stay, count_int, average_phq, average_scs, and average_as, in that order.
--The average columns should contain the average of the todep (PHQ-9 test), tosc (SCS test), and toas (ASISS test) columns for each length of stay, rounded to two decimal places.
--The count_int column should be the number of international students for each length of stay.
--Sort the results by the length of stay in descending order.
Select stay,
count(*) as count_int,
round(avg(todep),2) as average_phq,
round(avg(tosc),2) as average_scs,
round(avg(toas),2) as average_as
from students
where inter_dom = 'Inter'
group by stay
order by stay desc;