Please explain margin error in detail with working and confidence level. I have already solved for the best estimate.

Thank you

Use a t-distribution to nd a condence interval for the difference in means a' = \"I #2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d = x1 x2. A 99% condence interval for Md using the paired data in the fol lowing table: Case 1 2 3 4 5 Imatment 21 29 30 25 28 :reatment 19 30 25 22 20 Give the best estimate for pd, the margin of error, and the condence interval. Enter the exact answer for the best estimate, and round your answers for the margin of error and the condence interval to two decimal places. best estimate = 3_4