5.2. Ungrouped Data to Find the Mean http://www.ck12.org
Practice
- 45 students were asked how many e-mail messages they sent yesterday. The results are listed in the frequency
distribution table below. Calculate the mean number of e-mail messages sent by each student.
TABLE5.5:
Number of E-Mail Messages Number of Students (Frequency)
0 6
1 9
2 8
3 9
4 2
5 3
6 2
7 5
8 1- 70 drivers were asked how many parking tickets they got last year. The results are listed in the frequency
distribution table below. Calculate the mean number of parking tickets received by each driver.
TABLE5.6:
Number of Parking Tickets Number of Drivers (Frequency)
0 11
1 10
2 6
3 9
4 6
5 5
6 8
7 5
8 5
9 3
10 2- The following data shows the numbers of siblings of a group of grade 10 students. Organize the data in a
frequency distribution table and calculate the mean number of siblings of the students.
2 1 3 0 2 3 0 4
0 1 3 2 4 0 0 1
1 1 4 3 2 1 0 1
5 2 1 2 1 3 4 6
- The following data shows the numbers of touchdowns scored by each of the teams in the National Football
League last week. Organize the data in a frequency distribution table and calculate the mean number of
touchdowns scored by the teams.