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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:
38 countries/ areas
Highlight:
1 Republic of Korea4.15
2 Greece3.85
2 Turkiye3.85
4 Spain3.82
5 Japan 3.80
6 Mexico3.75
7 Portugal3.73
8 Slovenia3.65
9 Chile3.64
10 Italy3.61
11 Estonia3.58
12 Ireland3.56
12 Lithuania3.56
14 Costa Rica3.47
15 New Zealand3.43
16 Australia3.42
16 Colombia3.42
18 United States3.41
19 Hungary3.38
20 Latvia3.35
21 Canada3.32
21 France3.32
21 United Kingdom3.32
24 Germany3.26
25 Austria3.21
25 Finland3.21
27 Luxembourg3.14
27 Slovakia3.14
27 Switzerland3.14
30 Israel3.11
31 Sweden3.09
32 Denmark3.07
33 Iceland3.05
34 Norway3.03
35 Poland2.93
36 Czech Republic2.92
37 Belgium2.91
38 Netherlands2.66

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 data38
Regression equation
Y = -1.331761 X +11.203
Correlation coefficient (r)-0.659
Coefficient of determination (R2)0.434

GDP per capita (current US$)
No. of data38
Regression equation
Y = -36137.437894 X +166279.126
Correlation coefficient (r)-0.412
Coefficient of determination (R2)0.170

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = -0.163861 X +80.979
Correlation coefficient (r)-0.020
Coefficient of determination (R2)0.000

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.221595 X +2.327
Correlation coefficient (r)-0.232
Coefficient of determination (R2)0.054

Suicide - all ages (per 100,000 population)
No. of data38
Regression equation
Y = 0.388379 X +11.108
Correlation coefficient (r)0.023
Coefficient of determination (R2)0.001