Description of Data
This data set contains the achievement test (English as a Second Language) results and
some background data collected during experimental trial of a new ESL program. The study was
one year in duration. Students were allocated to the experimental ESL program class and a
regular program control class on a random basis. Vocabulary and grammar tests were
administered to the students in both groups at the beginning and the end of the school year.
Data can be found in the excel file: ESLprogram.xlsx
The dataset includes 24 cases and 7 variables:
Group (1 – experimental, 2 – control, 9 – missing)
Gender (1 – male, 2 – female, 9 – missing)
Pre-test vocabulary scores (scores range from 0 – 25, 99 – missing)
Pre-test grammar scores (scores range from 0 – 25, 99 – missing)
Post-test vocabulary scores (scores range from 0 – 25, 99 – missing)
Post-test grammar scores (scores range from 0 – 25, 99 – missing)
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