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Table 1 Comparison of means; BB-users included in analytic sample vs. BB-users in total vs. country population

From: Both sides of the story: comparing student-level data on reading performance from administrative registers to application generated data from a reading app

Variable Active BB users Potential users p-value Danish population p-value
Income (EURO) 47,171.73 41,527.09 0.000 39,702.70 0.000
Education (years) 14.49 14.27 0.000 13.94 0.000
Occupation (ISEI) 61.21 59.55 0.000 56.39 0.000
Test-score      
2nd grade 1.11 1.02 0.001 0.99 0.000
4th grade 0.98 0.90 0.003 0.85 0.000
6th grade 1.02 1.02 0.912 0.99 0.495
Single parents 0.20 0.21 0.027 0.21 0.004
Siblings 2.35 2.29 0.000 2.26 0.000
Immigrant status 0.15 0.13 0.000 0.12 0.000
Observations 13,999.00 54,991.00   436,436.00  
  1. Note: Based on data from reading app, national registers and reading ability test. ISEI: International Socio-Economic Index; 0-90 [19]. Income: Household income in EURO per year.