Table 3: Summary Statistics, all tested schools, 1996

|||Non-FT|S||FTS|||
|---|---|---|---|---|---|---|---|
|Variable description|Obs|Mean|St.Dev.|Obs|Mean|St.Dev.|t-stat|
|Score in language, out of 24|42616|14.41|4.72|984|12.45|4.60|-4.25|
|Score in math, out of 24|43854|11.97|4.60|999|10.49|3.86|-3.91|
|Student is female =1|44633|0.50|0.50|1022|0.50|0.50|-0.15|
|Student repeated at least one grade =1|43667|0.29|0.45|999|0.42|0.49|6.06|
|Student repeated two or more grades =1|43667|0.08|0.28|999|0.14|0.35|3.51|
|Student’s nr of years of preschool|41558|1.31|1.15|933|1.55|0.93|3.90|
|Household size|43847|5.16|1.89|1003|5.64|2.36|3.73|
|Household’s number of rooms|43827|3.77|1.55|1004|3.46|1.37|-3.63|
|Mother has no education =1|41762|0.14|0.35|960|0.26|0.44|5.24|
|Mother has at least primary education =1|41762|0.86|0.35|960|0.74|0.44|-5.24|
|Mother has done at least some secondary =1|41762|0.62|0.48|960|0.43|0.50|-6.25|
|Mother has at least ...nished secondary =1|41762|0.30|0.46|960|0.14|0.35|-7.93|
|Mother has completed tertiary education =1|41762|0.19|0.39|960|0.07|0.26|-9.08|
|Father has no education =1|38892|0.17|0.37|895|0.29|0.46|4.87|
|Father has at least primary education =1|38892|0.83|0.37|895|0.71|0.46|-4.87|
|Father has done at least some secondary =1|38892|0.59|0.49|895|0.40|0.49|-5.89|
|Father has at least ...nished secondary =1|38892|0.29|0.45|895|0.14|0.35|-7.49|
|Father has completed tertiary education =1|38892|0.17|0.38|895|0.08|0.27|-7.06|
|Teacher has only one year of experience|1753|0.02|0.15|47|0.06|0.25|1.17|
|Teacher has 2-3 years of experience|1753|0.05|0.22|47|0.04|0.20|-0.22|
|Teacher has 4-5 years of experience|1753|0.05|0.22|47|0.17|0.38|1.80|
|Teacher has 6-9 years of experience|1753|0.15|0.35|47|0.13|0.34|-0.37|
|Teacher has at least 10 years of experience|1753|0.73|0.44|47|0.60|0.50|-1.82|
|Average Class Size|1196|22.89|10.17|39|20.61|6.98|-1.39|
|School equipement (PC factor 1)|1196|0.19|0.83|39|0.10|0.71|-0.65|
|School auxiliary buildings (PC factor 1)|1196|-0.26|0.67|39|-0.47|0.26|-1.89|
|School socio-economic quintile|1196|3.54|1.43|39|4.44|0.82|3.88|

Notes: The statistics are based on the test scores and additional information that were collected at the time of the 1996 achievement tests. The non-full-time schools (columns 1-3) are those schools which were tested in 1996 and who had not converted to full-time status as of 2002. The full-time schools (colums 4-6) are the schools that were tested in both 1996 and 2002, and had converted to full-time status as of 2002. The potential comparison schools (columns 8-10) are those schools that were tested in both 1996 and 2002, and had not converted to full-time status as of 2002. t-statistics in column (7) are for a test of the null hypothesis that full-time and non-full-time have identical values. t-statistics in column (11) are for a test of the null hypothesis that full-time and comparison schools have identical values. The school socio-economic quintile was calculated by ANEP in basis of the 1996 data, and used for assigning schools to the full-time program. Schools in lower quintiles have better socio-economic environments. The t-tests at the student level and at the teacher level are clustered at the school level. * signi...cant at 10 percent; ** signi...cant at 5 percent; *** signi...cant at 1 percent.

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