# Correlational findings

## Study OECD (2017): study DE 2015

Public
15-16 aged, secundary school students, Germany, 2017
Survey name
INT-PISA 2015
Sample
Respondents
N = 6522
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 = + p < .05 Score decile        Mean Happiness
1                      7,15
2                      7,24
3                      7,26
4                      7,27
5                      7,28
6                      7,28
7                      7,27
8                      7,40
9                      7,52
10                     7,75

difference 10-1:      +0,60
O-SLW-c-sq-n-11-b = + p < .05 Score quarter       Mean Happiness
Bottom                 7,21
Second                 7,27
Third                  7,29
Top                    7,60

difference Top-Bottom:+0,39