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Table 6 Paired Samples t-test regarding the difference between the pre-test and post-test of USCG

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 −2.58333 .90791 .09906 −2.78036
Paired Samples Test
  Paired Differences T Df Sig. (2-tailed)
95% Confidence Interval of the Difference
Upper
Pair 1 Pre-test – Post-test −2.38631 −26.078 83 .000