Construct a 99% confidence interval estimate of the mean of the differences between volumes for the first born and the second born twins. What does the confidence interval suggest?
First Born 1005, 1035, 1281, 1051, 1034, 1079, 1104, 1439, 1029, 1160
Second Born 963, 1027, 1272, 1079, 1070, 1173, 1067, 1347, 1100, 1204