Correlational finding on Happiness and subject: Current age (in years)

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
PublicWorking people, USA, 2002
SampleProbability stratified sample
Respondents N =15450

Author's labelAge
Page in Source 1607
Our classificationCurrent age (in years)
Self report on single question on current age
Precise text not presented
Observed distributionM = 40.37, SD = 12.81

Observed Relation with Happiness
O-HL-c-sq-v-4-fr=+.10 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
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]

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.
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.