Correlational finding on Happiness and TIME
Subject code: T01

StudyOECD (2017): study PE 2015
TitlePISA 2015 Results. Students' Well-Being. Volume III.
SourceOECD Publishing, 2017, Paris, France
URLhttp://www.oecd-ilibrary.org/education/pisa-2015-results-volume-iii_9789264273856-en
Public15-16 aged, secundary school students, Peru, 2017
SampleProbability multi-stage random
Non-Response
Respondents N =6971

Correlate
Author's labelAfter school study time
Page in Source 247+TableIII.3.10AnnexB.p514
Our classificationTIME , code T01
Operationalization
Selfreport on question about 4 subjects:
'This schoolyear, approximately how many hours per week 
do you spend learning in addition to your required 
school schedule in the following subjects (included the 
hours for homework, additional instruction, and private 
study):
 - mathematics
 - test language
 - foreign language
 - other

(Slider range: 0  - '30 hours per week or more')
Observed distributionquartiles presented, M hours= 21 SD = 14

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
C-BW-c-sq-l-11-eDM=+ p < .05
4            M= 7,61
3            M= 7,52
2            M= 7,57
1            M= 7,42

4-1 difference +0,19


Appendix 1: Happiness measures used
CodeFull Text
C-BW-c-sq-l-11-eSelfreport on single question:

Here is a picture of a ladder. The top of the ladder '10' represents the best possible life for you and the bottom '0' is the worst possible life for you. In general , where on the ladder do you feel you stand at the moment? Tick the box next to the number that best describes where you stand
10 best possible
9
8
7
6
5
4
3
2
1
0 worst possible life


Appendix 2: Statistics used
SymbolExplanation
DMDIFFERENCE of MEANS
Type: descriptive statistic only.
Measurement level: Correlate: dichotomous, Happiness: metric
Range: depending on the happiness rating scale of the author; range symmetric about zero.

Meaning: the difference of the mean happiness, as measured on the author's rating scale, between the two correlate levels.
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl