1. Mean from frequency tables
A football team play 20 games, they record the number of goals they score in each game and record the data in a frequency table. Find the mean for the number of goals scored per game.
Number of goals in the game
Frequency 2 1 4 8 3 6
Total
This is the total number of goals
This is the total number of games
Total number of goals
Total number of games
Mean=
Mean=
A class records the number of pets each pupil has. Find the mean number of pets per pupil.
Number of pets
Frequency 8 1 7 2 5 3
Total
This is the total number of pets
This is the total number of pupils
Total number of pets
Total number of pupils
Mean=
Mean=

2. Number of bags eaten Frequency Number of detentions Frequency
The number of bags of sweets pupils eat in a day are recorded for 2 classes in year 8. Find the average number of bags eaten per day
Number of bags eaten
Frequency 10 1 15 2 20 3 5
Total
This is the total number of bags eaten
This is the total number of pupils
Total number of bags
Total number of pupils
Mean=
Mean=
The number of detentions pupils in year 8 receive over a 4 week period are recorded. Find the mean number of detentions they receive.
Number of detentions
Frequency 63 1 45 2 37 3 55
Total
This is the total number of detentions
This is the total number of pupils
Total number of detentions
Total number of pupils
Mean=
Mean=

3. Extension
A school is trying to reduce the number of late marks pupils receive. Here is the data for the whole of year 9 and the data for form 9U. Should the form tutor of 9U be happy with his form? 9U
Whole year
Number of late marks
Frequency 20 1 73 2 72 3 33 4
Total
Number of late marks
Frequency 10 1 8 2 3 4
Total