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Table 1 Descriptive statistics

From: The effect of sharing a mother tongue with peers: evidence from North Carolina middle schools

  All students LEP students Non-LEP students
Variable Mean Std. Dev. Mean Std. Dev. Mean Std. Dev.
Individual Characteristics       
Reading Std. Score 0.165 0.910 −0.634 0.801 0.208 0.896
Last year Reading Std. Score 0.126 0.927 −0.720 0.800 0.170 0.912
Math Std. Score 0.306 0.918 −0.223 0.789 0.335 0.916
Last year Math Std. Score 0.187 0.949 −0.407 0.809 0.219 0.945
Female 0.493 0.500 0.454 0.498 0.496 0.500
Low Income 0.487 0.500 0.861 0.346 0.466 0.499
Black 0.279 0.448 0.026 0.158 0.293 0.455
Hispanic 0.097 0.295 0.833 0.373 0.055 0.228
Asian/Pacific Islander 0.022 0.146 0.102 0.302 0.017 0.130
Limited English Proficient 0.053 0.225     
Transferred schools 0.316 0.465 0.357 0.479 0.314 0.464
Grade-Level Peer Characteristics       
% Female 0.493 0.047 0.492 0.046 0.493 0.047
% Limited English Proficient (LEP) 0.053 0.057 0.109 0.089 0.050 0.053
% Black 0.279 0.227 0.320 0.213 0.276 0.228
% Hispanic 0.099 0.084 0.172 0.122 0.095 0.079
% Asian/Pacific Islander 0.022 0.031 0.026 0.033 0.022 0.030
% Low Income 0.487 0.206 0.575 0.203 0.482 0.205
% Common Tongue (LEP only) 0.039 0.172 0.422 0.403 0.017 0.116
LEP Herfindahl Index 0.887 0.122 0.799 0.155 0.892 0.118
Reading Teacher Characteristics       
Reading: Female Teacher 0.891 0.312 0.881 0.324 0.891 0.311
Reading: Black Teacher 0.174 0.379 0.213 0.410 0.171 0.377
Reading: Hispanic Teacher 0.005 0.071 0.010 0.101 0.005 0.069
Reading: Asian Teacher 0.004 0.059 0.005 0.073 0.003 0.058
Reading: First-year Teacher 0.062 0.240 0.072 0.259 0.061 0.239
Number of Students 597,036 26,889 570,147
Number of Student-Year Observ. 1,340,833 71,465 1,269,368
  1. Notes: The statistics reported in the table are measured at the student + year, or observation, level. Each student has at most 3 observations. All grade-level peer characteristics and teacher characteristics correspond to the means at the student + year observation level. For example, 0.493 for % Female in the first column shows that observations in our data, students in given school years, have on average 49.3% female peers. Analogously, 89.1% of student observations in our data have a female teacher.