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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? - I write a summary. Then I check that each paragraph is covered in the summary, because the content of each paragraph should be included.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
38 countries/ areas
Highlight:
1 Republic of Korea3.97
2 Finland3.55
3 Mexico3.52
4 Portugal3.51
5 Chile3.48
6 Estonia3.46
7 Japan3.44
8 Hungary3.40
9 Ireland3.37
9 Spain3.37
11 Slovenia3.35
12 Sweden 3.33
13 Australia3.32
14 Lithuania3.31
14 Turkiye3.31
16 Poland3.30
17 New Zealand3.29
17 United States3.29
19 Costa Rica3.24
20 Canada3.22
20 Switzerland3.22
22 United Kingdom3.19
23 Greece3.16
23 Italy3.16
25 Latvia3.15
26 Colombia3.14
27 Norway3.09
28 France3.08
29 Belgium3.04
29 Germany3.04
29 Israel3.04
32 Netherlands3.01
33 Denmark3.00
34 Austria2.99
34 Iceland2.99
36 Luxembourg2.97
37 Czech Republic2.87
38 Slovakia2.68

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 = -0.652211 X +8.794
Correlation coefficient (r)-0.265
Coefficient of determination (R2)0.070

GDP per capita (current US$)
No. of data38
Regression equation
Y = -30908.485664 X +144511.854
Correlation coefficient (r)-0.249
Coefficient of determination (R2)0.062

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = 0.223223 X +79.131
Correlation coefficient (r)0.014
Coefficient of determination (R2)0.000

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.549041 X +3.362
Correlation coefficient (r)-0.404
Coefficient of determination (R2)0.163

Suicide, age-standardized (per 100 000 population)
No. of data38
Regression equation
Y = 5.657504 X -8.430
Correlation coefficient (r)0.319
Coefficient of determination (R2)0.102