The histogram shows the selfreported number of exercise hours in a week for 50 students. Without doing calculations, what is the approximate mean number of exercise hours for these 50 students? Explain.
Frequency
18-
16-
14-
12-
10-
8-
6-
4-
2-
04
0 2 4 6 8 10 12 14 16 18 20
Exercise Hours (per week)
Choose the correct answer below.
A. The mean is between about 4 and 6 hours. It is to the right of the peak because the distribution is skewed right.
B. The mean is between about 6 and 8 hours. The distribution is symmetric, so the mean should be about in the middle.
C. The mean is between about 2 and 4 hours. It is near the center because the distribution is roughly symmetric.
D. The mean is between about 4 and 6 hours. It is near the center because the distribution is roughly symmetric.