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Question: You have received a message in your inbox from a wellknown mobile phone operator telling you that you are one of the winners of a smartphone. The sender asks you to click on the link to fill out a form with your data so they can send you the smartphone. In your opinion, how appropriate are the following strategies in reaction to this email? - Answer the email and ask for more information about the smartphone.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
1 Republic of Korea3.58
2 Italy2.72
3 Canada2.67
4 United States2.66
5 France 2.48
5 Germany2.48
7 Japan2.44
8 United Kingdom2.43
9 Sweden2.42
10 Australia2.37

Note
The data of Azerbaijan are collected only in Baku. The data of China are collected only in Beijing, Shanghai, Jiangsu, and Zhejiang.

Source
OECD PISA 2018 Compendia

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data10
Regression equation
Y = -0.648300 X +8.356
Correlation coefficient (r)-0.560
Coefficient of determination (R2)0.314

GDP per capita (current US$)
No. of data10
Regression equation
Y = -14872.282111 X +87970.341
Correlation coefficient (r)-0.368
Coefficient of determination (R2)0.135

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 0.597041 X +80.433
Correlation coefficient (r)0.093
Coefficient of determination (R2)0.009

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = -0.698512 X +3.313
Correlation coefficient (r)-0.840
Coefficient of determination (R2)0.706

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = 8.714092 X -11.774
Correlation coefficient (r)0.676
Coefficient of determination (R2)0.457