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Table 3 Central and distribution indices of questionnaires variables

From: Assessing Iranian EFL teachers’ educational performance based on gender and years of teaching experience

Descriptive statistics
  N Mean Std. deviation Minimum Maximum Skewness Kurtosis
Listening 150 21.19 2.68 12 25 −0.48 0.39
Speaking 150 25.19 3.31 14 30 −0.44 −0.06
Reading 150 17.03 2.47 7 20 −0.84 0.91
Writing 150 17.15 2.23 10 20 −0.67 0.06
Vocabulary 150 21.01 3.10 11 25 −0.64 0.09
Grammar 150 16.61 2.48 8 20 −0.67 0.32
Designing and performing instruction 150 87.78 11.92 47 105 −0.72 0.26
Assessment 150 33.33 4.84 17 40 −0.64 0.39
Familiarity of students 150 29.23 4.03 18 35 −0.33 −0.44
Content knowledge 150 20.83 3.02 15 25 −0.26 −0.88
Classroom management 150 34.52 3.93 21 40 −0.54 −0.03
Professional development 150 323.87 37.14 209 385 −0.58 0.02
Valid N 150