Paired Samples Test Paired Differences 95% Confidence Interval of the Difference Std. Error Mean Std. Deviation Mean Lower Upper t df Sig. (2-tailed) Pair 1 Sixth_grade - third_grade 4.00000 4.00000 1.41421 .65592 7.34408 2.828 7 .025

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.