Validity conditions for theory-based analysis of paired data: Number of pairs: 88Theory-based methods of inference will work well for paired data if the distribution of differences has a symmetric distribution, or you have at least 20 pairs (i.e., at least 20 differences) and the distribution of the sample differences is not strongly skewed.Mean for Dutch = 5.163 Mean for FP = 4.779 This test is known as a paired t-test.Observed t-statistic = 5.33