Example 3 Ð Natural Pairs
You are interested in the number of viral infections that the average married couple experiences in a year. You ask 30 couples to participate in your study. You separate the spouses and ask them how many colds they have in the past year. Your H0 was that
the gender does not make a difference in the number of colds reported. The H1 was that the females experience more colds than the males.
1
5
2
4
1
5
2
3
0
4
1
4
3
8
1
3
3
4
3
6
4
7
3
5
2
7
0
5
3
6
D2
D
Males X2
Females X1
Number of colds
during past year