The Mean
Presentation
•
Mathematics
•
Vocational training
•
Practice Problem
•
Hard
Steve Dallow
FREE Resource
4 Slides • 3 Questions
1
The Mean
By Steve Dallow
2
Definition
The Mean
The Mean of a set of numbers in a data set is obtained by adding up all the numbers then dividing by the size of the data set.
3
Worked Example
Question
A football team played six games.
Here are the number of goals they scored in each game:
6, 0, 3, 2, 2, 5
Find the Mean number of goals.
4
Worked Example
Answer
5
Multiple Choice
Here are the ages of people in a family
15, 15, 19, 20, 54, 59
Work out the mean of the ages in this family. Give your answer to 3 significant figures.
30
30.0
30.3
31
6
Multiple Choice
The heights of some children (to the nearest cm) are shown below.
113, 111, 123, 121, 119, 113, 117
Calculate the mean height to 1 decimal place.
117.0
116.0
116.7
116.8
116.5
7
Fill in the Blanks
The Mean
By Steve Dallow
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