After completing a documentary film about the history of different font styles, the producer wonders if people will find the topic a bit boring. To measure boredom, she asks people to watch the film and then videotapes them while they are watching the film. Later, a research assistant watches the videos and records the number of times each person yarns. The data are as follows:
X F.
0 1
1 2
2 1
3 1
4 2
5 6
6 7
7 6
8 5
Compute the mean.
a. 5
b. 5.45
c. 4.5
d. 6.45
e. 6
f. 7