A doctor would like to estimate the mean difference in height of pairs of identical twins. The doctor randomly
selects 8 pairs of identical twins and determines the
current height, in inches, of each twin. The data are
displayed in the table.
What is the mean difference (tain 1 - tván 2) and the
standard deviation of the differences?
8
Pair
Twin 1
Twin 2
1 2
08 845
67 65
3
72
72
4
70
89.5
5
85
65
7
48
845
OZ=-0.125, 52=0224
• Za=-0.125, 52=0.5496
O 748=0.125, 5<=0224
O 70=0.125, 548=0.596
8
54
545
63