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 save the CSV file as students
SELECT *
FROM 'students.csv';-- Start coding here...
--Explore and understand the data
select count(*) as total_records
from 'students.csv'
-- Explore data per type of students
select inter_dom, count(*) as count_inter_dom
from 'students.csv'
group by inter_dom--Filter to understand the data for each student type
-- explore international students
select *
from 'students.csv'
where inter_dom = 'Inter'
--limit 10
-- explore domestic students
select *
from 'students.csv'
where inter_dom = 'Dom'
--limit 10
-- explore students with unknown status
select *
from 'students.csv'
where inter_dom is null
--Query the summary statistics of the diagnostics scores for all students
-- for phq test
select min(todep) as min_phq, max(todep) as max_phq , round(avg(todep),2) as avg_phq
from 'students.csv'-- for scs test
select min(tosc) as min_scs, max(tosc) as max_scs , round(avg(tosc),2) as avg_scs
from 'students.csv'
-- for as test
select min(toas) as min_as, max(toas) as max_as , round(avg(toas),2) as avg_as
from 'students.csv'--Summarize the data for international students only
-- for phq test
select min(todep) as min_phq, max(todep) as max_phq , round(avg(todep),2) as avg_phq
from 'students.csv'
where inter_dom = 'Inter'-- for scs test
select min(tosc) as min_scs, max(tosc) as max_scs , round(avg(tosc),2) as avg_scs
from 'students.csv'
where inter_dom = 'Inter'-- for as test
select min(toas) as min_as, max(toas) as max_as , round(avg(toas),2) as avg_as
from 'students.csv'
where inter_dom = 'Inter'