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Question: You have just read a long and rather difficult two-page text about fluctuations in the water level of a lake in Africa. You have to write a summary.How do you rate the usefulness of the following strategies for writing a summary of this two-page text? - Before writing the summary, I read the text as many times as possible.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
1 Republic of Korea4.15
2 Japan 3.80
3 Italy3.61
4 Australia3.42
5 United States3.41
6 Canada3.32
6 France3.32
6 United Kingdom3.32
9 Germany3.26
10 Sweden3.09

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 = -1.434912 X +11.744
Correlation coefficient (r)-0.922
Coefficient of determination (R2)0.850

GDP per capita (current US$)
No. of data10
Regression equation
Y = -24402.614302 X +134410.372
Correlation coefficient (r)-0.638
Coefficient of determination (R2)0.407

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 2.735053 X +72.399
Correlation coefficient (r)0.427
Coefficient of determination (R2)0.182

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = -0.774912 X +4.151
Correlation coefficient (r)-0.862
Coefficient of determination (R2)0.743

Suicide - all ages (per 100,000 population)
No. of data10
Regression equation
Y = 12.485346 X -29.354
Correlation coefficient (r)0.644
Coefficient of determination (R2)0.415