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...
SELECT COUNT(*)
FROM 'students.csv'SELECT inter_dom, COUNT(*) AS record_count
FROM 'students.csv'
GROUP BY inter_dom;-- Filter the data to see how it differs between the student types.
SELECT *
FROM 'students.csv'
WHERE inter_dom = 'Inter'-- Filter the data to see how it differs between the student types.
SELECT *
FROM 'students.csv'
WHERE inter_dom = 'Dom'-- Find the summary statistics of the diagnostic tests for all students using aggregate functions, rounding the test scores to two decimal places, remembering to use aliases.
SELECT ROUND(AVG(todep),2) AS average_depression, ROUND(AVG(tosc),2) AS average_social_connectedness, ROUND(AVG(toas),2) AS average_acc_stress
FROM 'students.csv'-- Repeat this to summarize the data for international students only.
SELECT ROUND(AVG(todep),2) AS average_depression, ROUND(AVG(tosc),2) AS average_social_connectedness, ROUND(AVG(toas),2) AS average_acc_stress
FROM 'students.csv'
WHERE inter_dom = 'Inter'-- See if length of stay impacts the average diagnostic scores rounded to two decimal places for international students, and order the results by descending order of the length of stay.
SELECT stay, ROUND(AVG(todep),2) AS average_phq, ROUND(AVG(tosc),2) AS average_scs, ROUND(AVG(toas),2) AS average_as
FROM 'students.csv'
WHERE inter_dom = 'Inter'
GROUP BY stay
ORDER BY stay DESC;