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Table 4 Paired Samples t-test between pre-test and post-test writing of SCG

From: The effect of structured versus unstructured collaborative pre-writing task on writing skills of the Iranian EFL students

Paired Samples Test
  Paired Differences
Mean Std. Deviation Std. Error Mean 95% Confidence Interval of the Difference
Lower
Pair 1 Pre-test – Post-test −1.42353 .60507 .06563 −1.55404
Paired Samples Test
  Paired Differences T Df Sig. (2-tailed)
95% Confidence Interval of the Difference
  Upper   
Pre-test – Post-test −1.29302 −21.691 84 .000