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The following table contains information on matched sample values whose differences are normally distributed. Use Table 2.NumberSample 1Sample 21 18 22 2 12 13 3 20 24 4 21 20 5 19 22 6 13 19 7 18 16 8 17 19 a.Construct the 95% confidence interval for the mean difference ?D. (Negative values should be indicated by a minus sign. Round all intermediate calculations to at least 4 decimal places. Round your answers to 2 decimal places.) Confidence interval is n/r to n/r