Correlational finding on Happiness and subject: Level of school-education

StudyDeVoe & Pfeffer (2009): study US 2002
TitleWhen Is Happiness About How Much You Earn? The Effect of Hourly Payment on the Money-Happiness Connection.
SourcePersonality and Social Psychology Bulliten, 2009, Vol. 12, 1602 - 1618
DOIDOI:10.1177/0146167209346304
PublicWorking people, USA, 2002
SampleProbability stratified sample
Non-Response
Respondents N =15450

Correlate
Author's labelCollege degree or higher
Page in Source 1607
Our classificationLevel of school-education
Operationalization
Self report on single question on level of 
school-education
1: college degree
0: other
Observed distributionM = 0.28, SD = 0.45

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-HL-c-sq-v-4-fr=+.08 p < .05


Appendix 1: Happiness measures used
CodeFull Text
O-HL-c-sq-v-4-fSelfreport on single question:

If you were to consider your life in general these days, how happy or unhappy would you say you are, on the whole...?
4 very happy
3 fairly happy
2 not very happy
1 not at all happy


Appendix 2: Statistics used
SymbolExplanation
rPRODUCT-MOMENT CORRELATION COEFFICIENT (Also "Pearson's correlation coefficient' or simply 'correlation coefficient')
Type: test statistic.
Measurement level: Correlate: metric, Happiness: metric
Range: [-1; +1]

Meaning:
r = 0 no correlation ,
r = 1 perfect correlation, where high correlate values correspond with high happiness values, and
r = -1 perfect correlation, where high correlate values correspond with low happiness values.
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl