Frequency tables: find the mean

Multiply each value by its count and add. Then divide by the number of observations.

1. A survey asked each household how many phone chargers it owns. Results: 2 chargers: 5 households; 3 chargers: 4 households; 4 chargers: 3 households; 5 chargers: 1 household. What is the mean?
2. A coach counted the goals scored in each game of a season. Results: 1 goal: 1 game; 2 goals: 2 games; 3 goals: 4 games; 4 goals: 4 games. What is the mean?
3. A survey asked each family how many pets they have. Results: 2 pets: 5 families; 3 pets: 3 families; 4 pets: 3 families; 5 pets: 1 family. What is the mean?
4. A teacher asked each student how many books they read this month. Results: 0 books: 2 students; 1 book: 1 student; 2 books: 2 students; 3 books: 5 students. What is the mean?
5. A teacher asked each student how many books they read this month. Results: 0 books: 8 students; 1 book: 7 students; 2 books: 4 students; 3 books: 2 students. What is the mean?
6. A survey asked each household how many phone chargers it owns. Results: 0 chargers: 4 households; 1 charger: 5 households; 2 chargers: 6 households; 3 chargers: 1 household; 4 chargers: 6 households. What is the mean?
7. A survey asked each household how many phone chargers it owns. Results: 0 chargers: 2 households; 1 charger: 6 households; 2 chargers: 3 households; 3 chargers: 8 households; 4 chargers: 1 household. What is the mean?
8. A survey asked each student how many pets they have. Results: 1 pet: 4 students; 2 pets: 9 students; 3 pets: 3 students; 4 pets: 1 student; 5 pets: 8 students. What is the mean?
9. A survey asked each family how many pets they have. Results: 0 pets: 6 families; 1 pet: 6 families; 2 pets: 7 families; 3 pets: 8 families; 4 pets: 5 families. What is the mean?
10. A survey asked each student how many pets they have. Results: 2 pets: 4 students; 3 pets: 4 students; 4 pets: 8 students; 5 pets: 4 students; 6 pets: 4 students. What is the mean?
11. A coach counted the goals scored in each game of a season. Results: 2 goals: 1 game; 3 goals: 9 games; 4 goals: 3 games; 5 goals: 7 games; 6 goals: 2 games. What is the mean?
12. A survey asked each household how many phone chargers it owns. Results: 0 chargers: 3 households; 1 charger: 5 households; 2 chargers: 2 households; 3 chargers: 4 households; 4 chargers: 5 households; 5 chargers: 8 households. What is the mean?
13. A survey asked each household how many phone chargers it owns. Results: 0 chargers: 20 households; 1 charger: 1 household; 2 chargers: 5 households; 3 chargers: 3 households; 4 chargers: 3 households. What is the mean?
14. A survey asked each household how many phone chargers it owns. Results: 1 charger: 13 households; 2 chargers: 12 households; 3 chargers: 7 households; 4 chargers: 6 households; 5 chargers: 16 households. What is the mean?
15. A teacher asked each student how many books they read this month. Results: 0 books: 20 students; 1 book: 3 students; 2 books: 7 students; 3 books: 9 students; 4 books: 17 students. What is the mean?
16. A survey asked each student how many pets they have. Results: 1 pet: 14 students; 2 pets: 18 students; 3 pets: 16 students; 4 pets: 11 students; 5 pets: 16 students; 6 pets: 1 student. What is the mean?
17. A survey asked each family how many pets they have. Results: 2 pets: 23 families; 3 pets: 34 families; 4 pets: 18 families; 5 pets: 17 families; 6 pets: 24 families; 7 pets: 5 families. What is the mean?
18. A coach counted the goals scored in each game of a season. Results: 2 goals: 23 games; 3 goals: 3 games; 4 goals: 19 games; 5 goals: 11 games; 6 goals: 28 games; 7 goals: 33 games. What is the mean?
19. A survey asked each family how many pets they have. Results: 1 pet: 32 families; 2 pets: 14 families; 3 pets: 25 families; 4 pets: 29 families; 5 pets: 8 families; 6 pets: 11 families. What is the mean?
20. A teacher asked each student how many books they read this month. Results: 0 books: 10 students; 1 book: 26 students; 2 books: 2 students; 3 books: 2 students; 4 books: 10 students; 5 books: 37 students. What is the mean?