# Correlational findings

## Study OECD (2017): study GR 2015

Public
15-16 aged, secundary school students, Greece, 2017
Survey name
INT-PISA 2015
Sample
Respondents
N = 5532
Non Response
Assessment
Questionnaire: Conputer Assisted Web Interview (CAWI)

## Correlate

Authors's Label
School performance in mathematics
Our Classification
Distribution
Deciles and quartiles
Operationalization
Mathematical performance, for PISA, measures the mathematical literacy of a 15 year-old to formulate, employ and interpret mathematics in a variety of contexts to describe, predict and explain phenomena, recognising the role that mathematics plays in the world. The mean score is the measure. A mathematically literate student recognises the role that mathematics plays in the world in order to make well-founded judgments and decisions needed by constructive, engaged and reflective citizens.

## Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-SLW-c-sq-n-11-b = + ns Score decile        Mean Happiness
1                      6,87
2                      6,80
3                      6,73
4                      6,80
5                      6,87
6                      6,92
7                      6,94
8                      6,94
9                      7,09
10                     7,16

difference 10-1:      +0,29
O-SLW-c-sq-n-11-b = + ns Score quarter        Mean Happiness
Bottom                  6,82
Second                  6,81
Third                   6,93
Top                     7,09

difference Top-Bottom: +0,27