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Table 1 Descriptive statistics of the proficiency test for each proficiency level

From: Relationship between types of distractor and difficulty of multiple-choice vocabulary tests in sentential context

   n Mean SD
PARA group Upper 29 23.21 1.99
Middle 43 18.21 1.49
Lower 51 12.33 2.69
Total 123 16.95 4.84
SYN group Upper 32 24.25 2.03
Middle 48 17.90 1.45
Lower 51 11.69 2.75
Total 131 17.03 5.38
CON group Upper 45 23.93 2.03
Middle 32 18.19 1.62
Lower 41 12.02 2.51
Total 118 18.24 5.51